09 Dec Rihanna & Adam Lambert Attend Vevo Launch

[caption id="attachment_16963" align="aligncenter" width="410" caption="Rihanna & Adam Lambert. Photo: GettyImages.com"][/caption] Rihanna, Adam Lambert, John Mayer, Taylor Swift, Pete Wentz, Mariah Carey & Sheryl Crow showed up for the VEVO launch. Vevo is...