The Backyardigans is a CGI-animated musical TV series created by Janice Burgess.
 It is a co-production of animation studio Nelvana and Nickelodeon Animation Studios.
 The series debuted on October 11, 2004 and ended on May 31, 2010.
 The show airs on Treehouse TV in Canada.
 In 2015, the first season was included as part of Nick Jr.'s Noggin app, a mobile application featuring episodes of older Nick Jr. programs.
Sean Curley (born 1995) is an American actor.
 He is the singing voice of Pablo on "The Backyardigans" and Spencer on "Whoopi's Littleburg".
 He also played Josh Learner in "Reservation Road".
 On Broadway, he has been in "Fiddler on the Roof" and "Beauty and the Beast".
 He is also a member of The Broadway Kids and the Nautical Stars Theater Company.
Richard Ian Cox (born October 3, 1973) is a Welsh-Canadian actor, online radio host, and comedian.
 He is best known for his voice acting for English language dubs of anime, mainly for "InuYasha".
 Richard gained prominence for playing the character of Henry Dailey's (played by Mickey Rooney) teenaged traveller and horse rider, Alec Ramsay, in The Family Channel's "Adventures of the Black Stallion" during the early 1990s.
 Cox also gained fame for voicing Ian Kelley, the title character in the animated series "Being Ian", and for voicing Scattershot, one of the Autobots in the CGI-Animated series "".
 In 2015, he provided the voice of Lofty in the American dubbed version of the 2015 reboot of the British children's animated television series "Bob the Builder" taking over from both Sonya Leite and Emma Tate.
 He maintains an active online presence on Tumblr and Twitter as well as Facebook.
 He hosts his own podcast called "The Show".
Hopla is a Flemish CGI-animated series for toddlers, created by Bert Smets in 1999, and produced by Bert Smets Productions.
 The cartoon features the rabbit Hopla and his friends – the pig Onki, the bear Nina, and the kitten Lola.
 Each episode is about five minutes.
 Similar to its spiritual predecessor Tik Tak, the show is aimed for children between 0–2 years old and has no dialogue (the only dialogue is the show's name).
The bass singing voice has a vocal range that lies around the second E below middle C to the E above middle C (i.e., E–E).
 As with the contralto singing voice being the rarest female voice type, the bass voice is the rarest for males, and has the lowest vocal range of all voice types.
 However, the bass voice is determined not only by its vocal range, but also by its timbre, which tends to be darker than that of a baritone voice.
Special Agent Oso is an interactive American CGI-animated series for pre-school audiences series created by Ford Riley.
 The series premiered on April 4, 2009 as part of Disney Channel's Playhouse Disney block, and was one of the charter series that was part of the replacement Disney Junior block which started on February 14, 2011, and later, the Disney Junior channel.
Monster By Mistake!
 is a Canadian CGI-animated series that aired on YTV from October 31, 1996 to March 23, 2003.
 The series was created by Mark Mayerson of Catapult Productions based off the children's hospital drama book series of the same name, and co-produced with CCI Entertainment (formerly Cambium) in Toronto, Canada.
 The two companies partnered in Studio 345, a computer animation and former Sears catalogue production facility for the production of the show, which was made using Houdini software.
ReBoot: The Guardian Code is an upcoming Canadian live-action/CGI-animated television series, produced by Rainmaker Entertainment.
 It is a "re-imagining" or a "sequel" of the 1994 CGI-animated series "ReBoot" and is planned to air on YTV sometime in 2018.
Janice Burgess is the former key person of Nick Jr..
 She is the creator and executive producer of "The Backyardigans", a CGI-animated series on Nick Jr. running from 2004 to 2010 about five high-spirited friends and their imaginative, musical journeys.
Andrea Robinson is an American singer and voice actress.
 She has been a chorus member and singing voice for other actresses in many films (animated and live action).
 She also was the opening act for Burt Bacharach.
 Her most prominent job as a singing voice of another actress is Sister Mary Robert (Wendy Makkena) in "Sister Act".
 Her most prominent role in animation is the singing voice of Queen Athena in "."

Question: Sean Curley is a singing voice on the CGI-animated series created by whom?
Answer: Janice Burgess