Twilight Stars Light Up Celebrity-Packed U2 Concert

It was a beautiful day for Twilight fans at U2's YouTube-broadcast concert at the Rose Bowl in Pasadena, California, where Ashley Greene and Kellan Lutz were among the many celebrities that attended the Sunday event.

Other celebs turning out for the star-studded event included Christian Slater, Alyssa Milano, Orlando Bloom, AnnaLynne McCord, Zachary Quinto, Colin Farrell, Ewan McGregor, Paris Hilton, Chris O'Donnell, Cindy Crawford and Transformers director Michael Bay.

The concert, which was streamed via the popular media-sharing Web site, was in support of the Irish band's platinum album, No Line on the Horizon; for fans wanting more Greene and Lutz, New Moon hits theaters Nov. 20.