Your baby can roll like a rock star and in Gwen Stefani's Bugaboo! The L.A.M.B. designer created a signature buggy to benefit the Global Fund. The singer's autographed Chameleon will be put to auction on Wednesday, December 1, 2010. The winning bid (which will be announced on Sunday, December 5) will be donated to eliminate AIDS in Africa. The celebrity mama's one-of-a-kind stroller won't blend in with the rides at the park as it features a floral and graffiti carriage and leather detailing. Check out the details below and then head over to Bugaboo to bid!