Katy Perry, Christina Aguilera and Steven Tyler are raising money for homeless gay youngsters by donating prizes to Cyndi Lauper's winter charity auction.
Perry has handed over an autographed Baby Taylor acoustic guitar, Aguilera is offering up two tickets to a taping of The Voice in April (12), and Tyler is inviting a fan to meet him on the set of American Idol.
Money raised from the Charity Buzz auctions will benefit Lauper's True Colors Fund, which helps young gay, lesbian, bisexual and transgender people suffering tough times.
Lauper, a longtime advocate for gay rights, has also donated an evening of her time - she's promised to take her winning bidder bowling in New York City.