Question: Where are the operational headquarters of the cruise line on which Amber Hurst Martin has worked as a singer and actress?

Context paragraphs:
Premier Cruises: Premier Cruises was a cruise line holding company formed in the early 1990s that focused on the family cruise market as well as on developing cruise operations in new geographic markets.  The company's business focus was to acquire older cruise vessels, refurbish these vessels in order to offer "traditional cruise experiences", operate the vessels in geographic areas, such as Europe and south/Central America, which the major operators such as Carnival Cruise Line, Norwegian Cruise Line and Royal Caribbean International were not focusing at the time, and to market their cruises largely to European and South American customers through strategic marketing partnerships with some of the major tour and travel groups in the world such as Thomson Holidays in the U.K, TUI in Germany, Fritidsresor in Scandinavia, Alpitour in Italy and Pullmantur in Spain (subsequently acquired by Royal Caribbean International for $800 million,) as well as through more than a dozen operators in south / Central America such as CVC in Brazil (which was acquired by the Carlyle Group [63.6%] in January 2010 for $250 million).  The company was operating out of its main offices in Cape Canaveral and Miami, Florida.

P&amp;O Cruises Australia: P&O Cruises Australia is a British-American owned cruise line with corporate headquarters at Carnival House in Southampton, England and operational headquarters in North Sydney, New South Wales, Australia.  The sister company of P&O Cruises in the United Kingdom, it was previously a constituent of the Peninsular & Oriental Steam Navigation Company and has a direct link in history to the world's first passenger ships.  As such, it is one of the oldest cruise lines in the world, and now forms part of the Carnival Corporation & plc, under the executive control of Holland America Line.  It currently operates five ships, sailing from various ports in Australia and New Zealand.

Premier Cruise Line: Premier Cruise Line, a subsidiary of Premier Cruises, was a cruise line that was headquartered in Cape Canaveral, Florida.  It was at one time licensed as the official cruise line of Walt Disney World and used the trademark "The Big Red Boat" based on the color scheme of some of its ships.  Dolphin Cruise Line, a company that became a part of Premier, was headquartered on Dodge Island in Miami.

Imperial Majesty Cruise Line: Imperial Majesty Cruise Line was a budget cruise line that had operated 2 and 3 day voyages out of Port Everglades, Florida to Nassau, Bahamas.  The company was founded in 1999.  The cruise line attracted both vacationers and vintage ship fans from around the world.  The cruise line's current operations ended on March 9, 2009, when the Regal Empress was retired.  In that same week, its operations were replaced by another cruise line operating for the same company that Imperial Majesty was part of.

RMS Transvaal Castle: RMS "Transvaal Castle was a British ocean liner built by John Brown & Company at Clydebank for the Union-Castle Line for their mail service between Southampton and Durban.  In 1966 she was sold to the South Africa-based Safmarine and renamed S.A. Vaal for further service on the same route.  Following cessation of the service between the UK and South Africa in 1977 the ship was sold to Carnival Cruise Line and rebuilt in Japan as the cruise ship SS "Festivale, re-entering service in 1978.  In 1996 she was sold to Dolphin Cruise Line and renamed IslandBreeze.  The vessel spent some of her time under Dolphin Cruise Line ownership on charter to Thomson Cruises.  In 1998 the ship was sold to Premier Cruise Line and renamed SS "Big Red Boat III.  Following the bankruptcy of Premier Cruise Line 2000, "Big Red Boat III" was laid up until 2003 when she was sold to the scrappers in Alang, India.  The ship became The Big Red Boat" for her final voyage to the scrapyard.

Disney Cruise Line: Disney Cruise Line is a cruise line operation that is a subsidiary of The Walt Disney Company.  The company was incorporated in 1996 as Magical Cruise Company Limited and is domiciled in London, England, with their operational headquarters located in Celebration, Florida.  The president, Karl Holz, will be replaced by Anthony Connelly in October 2017.

MS Regal Empress: MS "Regal Empress was a cruise ship that recently operated for Imperial Majesty Cruise Line.  She was built in 1953 by Alexander Stephen & Sons at Glasgow, Scotland as the ocean liner SS "Olympia for the Greek Line.  Greek Line withdrew the "Olympia" from service in 1974.  Following an extended lay-up period and reconstruction into a diesel-engined Caribbean cruise ship, the ship re-emerged in 1983 as MS "Caribe I" for Commodore Cruise Line.  In 1993 she was sold to Regal Cruise Line and received her final name.  She operated for Imperial Majesty Cruise Line from 2003 until 2009.  The "Regal Empress" was also the last vintage passenger ship to regularly sail from the United States.

Majesty Cruise Line: Majesty Cruise Line is a Norwegian cruise line probably known for owning the Norwegian Majesty from 1992 to 1997.  Majesty Cruise Line was a more upmarket brand created by Dolphin Cruise Line in 1993.  Their first ship, the Royal Majesty, was originally ordered by Birka Line for their 24-hour cruises out of Stockholm.  Following the bankruptcy of builders Wärtsilä, the contract was resold to Majesty Cruise Line and the vessel was completed as Caribbean cruise ship Royal Majesty in 1992.  She initially worked three- and four-night cruises out of Florida, but in 1995 opened a new summer Boston-Bermuda route, terminating at St George's rather than the usual Hamilton in Bermuda.  Royal Majesty returned to Florida in the winter.  In June 1995 she ran aground on Rose and Crown shoal of Nantucket Island, due to a combination of faulty GPS and inadequate watch being maintained.  Royal Majesty was 17 miles off course.  She remained aground for 24 hours before tugs towed her off.  In 1997, a second ship was added to the fleet, the Crown Majesty (previously Crown Dynasty).  For the 1997 season, she operated cruises which had already been arranged for Crown Dynasty, but at the end of that season both ships passed to Norwegian Cruise Line (NCL).  Royal Majesty was sold to NCL, being renamed Norwegian Majesty, and soon received a similar lengthening to Norwegian Wind/Dream.  Crown Majesty which had been chartered from Effjohn International, had her charter transferred to NCL.

Fiesta Marina Cruises: Fiesta Marina Cruises was an experimental short-lived subsidiary cruise line of Carnival Cruise Lines.  The cruise line was marketed toward the Latin/Spanish-speaking population, residing in the United States and abroad.  The cruise line sailed out of San Juan, Puerto Rico and Caracas, Venezuela.  The cruise line operated only one ship, the "Fiesta Marina".  The ship was named in Miami, Florida on October 18, 1993.  The cruise line was a total marketing failure and was dissolved in September 1994.  The "Fiesta Marina" was sold to Epirotiki Cruises to sail as the "Olympic".  In 2007, the Carnival Corporation started a joint-partnership with the Orizonia Corporación to start a new cruise line called Iberocruceros.  Just like Fiesta Marina, the new cruise line was marketed toward the Latin/Spanish-speaking population.  The cruise line operated out of South America and Europe, independently from Carnival, but was managed by Costa Cruises.  Iberocruceros was closed in 2014 and its ships transferred to Costa or elsewhere.

Amber Hurst Martin: Amber Hurst Martin is an American singer and actress.  Her first national tour was with "Jesus Christ Superstar" and she has also appeared across the U.S., the Caribbean and South Korea with Disney Cruises, "Sunfish The Musical" and the It Gets Better Tour.  Her television appearances as a solo vocalist with the It Gets Better tour cast include "Dance Moms" and "I Am Cait".

Supporting paragraphs: Amber Hurst Martin Disney Cruise Line
Answer: Celebration, Florida