Elton John, Stevie Wonder and Gladys Knight were whose friends on her 1985 hit 'That's What Friends Are For'?

"That's What Friends Are For" is a song written by Burt Bacharach and Carole Bayer Sager. It was first recorded in 1982 by Rod Stewart for the soundtrack of the film Night Shift, but it is better known for the 1985 cover version by Dionne Warwick, Elton John, Gladys Knight and Stevie Wonder. This recording, billed as being by "Dionne & Friends", was released as a charity single for AIDS research and prevention. It was a massive hit, becoming the #1 single of 1986 in the United States, and winning the Grammy Awards for Best Pop Performance by a Duo or Group with Vocals and Song of the Year. Its sales raised over US$3 million for its cause.

A one-off collaboration headed by Dionne Warwick and featuring Gladys Knight, Elton John, and Stevie Wonder was released as a charity single in the United Kingdom and the United States in 1985. It was recorded as a benefit for American Foundation for AIDS Research, and raised over US$3 million for that cause. Warwick, who had previously raised money for blood-related diseases such as sickle-cell anemia, wanted to help combat the then-growing AIDS epidemic because she had seen friends die painfully of the disease.