PopSugar Rush: rush.popsugar.tv Facebook: facebook.com Twitter: twitter.com The American Music Awards bring out the pop stars, boy bands, and Glee cast for a huge musical night! I’m Karli and this is your PopSugar Rush! It was a parade of pop stars on the American Music Awards red carpet in LA Sunday—red haired Rihanna raced down the line just in time to open the show, while good friend Katy Perry chatted with reporters before her explosive number. A pregnant Pink got the party started on her way in ahead of her time on stage, while fellow performer Miley Cyrus had to have some help with her extravagantly long train. Gavin Rossdale told us No Doubt’s new material is amazing. He and Usher represented for the guys, but it was all about Justin Bieber, who won artist of the year, and the boy bands”We’re very excited.” “No we’re excited, it’s gonna be a lot of fun.”—The New Kids on the Block and Backstreet Boys teamed up to close the show, kicking off a party-filled night all to celebrate music. We were at Rolling Stone’s rockin afterparty. Lindsay: “It’s hard to imagine a more fitting location for tonight’s afterparty than the new Rolling Stone restaurant in the heart of Hollywood.” Katy came arm in arm with hubby Russell Brand. Ke$ha arrived in another crazy getup alongside a ton of other singing stars. They may not have been nominated, but the Glee guys were in full force, stopping to talk about the show’s most recent controversy. Dina Lohan is reportedly upset that Gwyneth …