Roberto Cavalli, a favorite designer of such A-list stars as Halle Berry, Jennifer Lopez and Christina Aguilera is joining the ranks of designers like Karl Lagerfeld and Victor & Rolf in collaborating with H&M. And what better way to celebrate than with a party? Mom-to-be Halle Berry slipped into a sexy halter dress from the designer’s top line to accompany him to his lavish event in Rome. The actress gushed that, “Roberto Cavalli is one of my personal favorites. His clothes are sexy, edgy and fashion forward. I think the collaboration with H&M is great because now all women can wear his designs.” We can’t wait! Expect glamorous animal prints and sleek tuxedo lines when Cavalli’s Holiday line hits select H&M locations starting November 8th. Go to HM.com for more information. Tell us: Will you wait in line for the Cavalli collection?