Question: Debra Byrd has worked with which singer-songwriter?

Context paragraphs:
Debra Byrd: Debra Byrd (born in Cleveland, Ohio) is an American vocalist who has worked with Barry Manilow in and after Lady Flash and Bob Dylan, appeared on Broadway, and serves as the head vocal coach for "American Idol" and "Canadian Idol", also singing backup for the contestants.  Byrd has helped with vocals on the Hub Television Series "Majors and Minors".

Bretton Byrd: Bretton Byrd (1904–1959) was a British composer and musician known for his work on film scores between 1932 and 1956.  Byrd was employed by British Gaumont, then the largest British production company, in the 1930s.  He worked alongside Louis Levy writing scores for films such as "It's Love Again" (1936) Byrd worked for the company's musical department both as a composer and arranger.  After leaving British Gaumont, he was employed by a variety of other production companies and in the 1950s also worked in television.

Ill Behaviour: "Ill Behaviour" is a song by drum and bass DJ, producer and musician Danny Byrd.  It is the second single released from his third album, "Rave Digger".  The song was released on 26 September 2010 by Digital download and on 27 September 2010 by 12".  The song features the voice of Singer/songwriter I-Kay from Bristol, who has worked very well on several Danny byrd track releases.  III Behaviour has been supported by MistaJam, Annie Mac and Sara Cox on BBC Radio 1.  The single was promoted to BBC Radio 1 A-list status on 8 September 2010.  The single entered the UK Singles Chart at number 36, Byrd's first Top 40 single.  It is featured as a soundtrack to the video game "F1 2011".

Lady Flash: Lady Flash was an American trio of singers whose members were Lorraine Mazzola, Monica Pege and Debra Byrd.  They were the featured backup group for Barry Manilow from 1974-1979 and released one hit of their own, 1976's "Street Singin'".  The tune, which was written and arranged by Manilow, reached #27 on the Billboard Hot 100 record chart.  The song came from their album, "Beauties In The Night" which was also produced by Manilow.

This Is the New That: This Is the New That is the fourth album by American singer-songwriter Jonathan Byrd.  It was officially released March 21, 2007, although online availability began in late December 2006.  While Byrd's earlier recordings have been in more of a traditional folk vein ranging at times from bluegrass to world music, this release places Byrd's song craft in somewhat more of a rock setting.  According to Byrd, some of his diverse influences here include Bob Dylan, Anais Mitchell, The Beatles & Merle Haggard.

Barry Manilow: Barry Manilow (born Barry Alan Pincus; June 17, 1943) is an American singer-songwriter, arranger, musician, and producer with a career that has spanned more than 50 years.  His hit recordings include "Mandy", "Can't Smile Without You", and "Copacabana (At the Copa)".

Cackalack: Cackalack is a 2010 studio album by Americana singer-songwriter Jonathan Byrd.  The title is a variation of the word "Cackalacky", a popular (though at times derogatory) nickname for the Carolinas and the songs all connect to the culture and music of Byrd's home state of North Carolina.  The album was recorded in a single day with a group of musicians, including members of Creaking Tree String Quartet.

Spitz Ridge: Spitz Ridge ( ) is a prominent, mainly ice-covered ridge east of Cox Bluff, forming the east end of Toney Mountain, in Marie Byrd Land.  Mapped by United States Geological Survey (USGS) from ground surveys and U.S. Navy air photos, 1959-66.  Named by Advisory Committee on Antarctic Names (US-ACAN) for A. Lawrence (Larry) Spitz, ionospheric physicist, who wintered at Byrd Station in 1966 and worked additional summer seasons at Byrd and Hallett Station.

Wildflowers (Jonathan Byrd album): Wildflowers is the 2001 debut album by Jonathan Byrd.  The songs are mostly original songs with a few traditional tunes.  Here he mixes contemporary singer-songwriter storytelling with Appalachian folk roots.  There is even a murder ballad; "Velma" is a song about serial killer Velma Barfield whose victims included Byrd's own grandfather. " Sing Out! " says, "[Jonathan Byrd's] songwriting melds the lyricism of Celtic music with the stark storytelling of the finest traditional balladeers."

The Waitress: The Waitress is the second album by folk singer-songwriter Jonathan Byrd.  The album was released in 2003, the same year that Byrd won the New Folk competition at the Kerrville Folk Festival.  "The Waitress" reached #20 on the Folk Radio Airplay Chart and has been noted for Byrd's lyrical character sketches and deftly played guitar.

Supporting paragraphs: Debra Byrd Barry Manilow
Answer: Barry Manilow