Guy Roche is a record producer

Record producer

A record producer is an individual working within the music industry, whose job is to oversee and manage the recording of an artist's music...

 and songwriter

Songwriter

A songwriter is an individual who writes both the lyrics and music to a song. Someone who solely writes lyrics may be called a lyricist, and someone who only writes music may be called a composer...

 who is best known for the hit singles he has co-written/co-produced for Christina Aguilera

Christina Aguilera

Christina María Aguilera is an American recording artist and actress. Aguilera first appeared on national television in 1990 as a contestant on the Star Search program, and went on to star in Disney Channel's television series The Mickey Mouse Club from 1993–1994...

, which include but are not limited to "What a Girl Wants

What a Girl Wants (song)

"What a Girl Wants" is the second single performed by Christina Aguilera from her self-titled debut album. The song was released on November 28, 1999, which was ten days after Aguilera's nineteenth birthday. The song peaked at number one on the Billboard Hot 100 on January 15, 2000 for two weeks,...

", "I Turn to You

I Turn to You (Christina Aguilera song)

"I Turn to You" is a pop song written by Diane Warren in 1996. The original version of the song was recorded that year by R&B quartet All-4-One for the soundtrack album to the Warner Bros. film Space Jam....

", and "Come on Over Baby (All I Want Is You)

Come on over Baby (All I Want Is You)

"Come On Over Baby " is a song co-written by American pop singer Christina Aguilera, Paul Rein, Johan Aberg, Celebrity Status "Come On Over Baby (All I Want Is You)" is a song co-written by American pop singer Christina Aguilera, Paul Rein, Johan Aberg, Celebrity Status "Come On Over Baby (All I...

. He also co-wrote Brandy's Never Say Never

Never Say Never (Brandy song)

"Never Say Never" is a R&B song written by American singer Brandy, Rodney "Darkchild" Jerkins, Isaac Phillips, Paris Davis, and Sean Bryant for Brandy's second studio album, Never Say Never...

single "Almost Doesn't Count

Almost Doesn't Count

"Almost Doesn't Count" is an Grammy-award nominated R&B ballad written by Shelly Peiken and Guy Roche for Brandy's second studio album Never Say Never . It also was produced by Roche and released as the album's fourth single during the second quarter of 1999 .The ballad reached the top 20 in New...

" (along with Shelly Peiken

Shelly Peiken

Shelly Peiken is a multi-platinum Grammy nominated songwriter who is best known for her #1 hits "What a Girl Wants" and "Come on Over Baby ".Shelly and Meredith Brooks earned a Grammy nomination for Brooks's hit song "Bitch"....

). He also produced Selena

Selena

Selena Quintanilla-Pérez , known simply as Selena, was a Mexican American singer-songwriter. She was named the "top Latin artist of the '90s" and "Best selling Latin artist of the decade" by Billboard for her fourteen top-ten singles in the Top Latin Songs chart, including seven number-one hits...

's song "Dreaming Of You", included on Selena's last album "Dreaming of You", before her death. He also co-wrote Dru Hill's hit single "Beauty". He has also written and produced songs for Aaliyah

Aaliyah

Aaliyah Dana Haughton , who performed under the mononym Aaliyah , was an American R&B recording artist, actress and model. She was born in Brooklyn, New York, and was raised in Detroit, Michigan. At the age of 10, she appeared on the television show Star Search and performed in concert alongside...

, Gladys Knight

Gladys Knight

Gladys Maria Knight , known as the "Empress of Soul", is an American singer-songwriter, actress, businesswoman, humanitarian, and author...

, Natasha Bedingfield

Natasha Bedingfield

Natasha Anne Bedingfield is a British pop singer and songwriter. Bedingfield debuted in the 1990s as a member of the Christian dance/electronic group The DNA Algorithm with her siblings Daniel Bedingfield and Nikola Rachelle...

, Brandy

Brandy Norwood

Brandy Rayana Norwood , known professionally as Brandy, is an American singer-songwriter, producer, actress, and dancer. In 2009, she introduced her rap alter-ego Bran'Nu....

, Cher

Cher

Cher is an American recording artist, television personality, actress, director, record producer and philanthropist. Referred to as the Goddess of Pop, she has won an Academy Award, a Grammy Award, an Emmy Award, three Golden Globes and a Cannes Film Festival Award among others for her work in...

 (including her #3 Billboard hit "If I Could Turn Back Time"), Celine Dion

Celine Dion

Céline Marie Claudette Dion, , , is a Canadian singer. Born to a large family from Charlemagne, Quebec, Dion emerged as a teen star in the French-speaking world after her manager and future husband René Angélil mortgaged his home to finance her first record...

, and Dru Hill

Dru Hill

Dru Hill is an American singing group, most popular during the late 1990s, whose repertoire included R&B, soul, and gospel music. Founded in Baltimore, Maryland, and active since 1992, Dru Hill recorded seven Top 40 hits, and is best known for the R&B #1 hits "In My Bed", "Never Make a Promise", ...

.