Kate Bosworth arrived in a colorful Missoni top and debuted her newly dip-dyed tips at last night's sold-out Coldplay concert at UCLA. She's the latest star to experiment with unexpected hair color following Lauren Conrad's pre-Fourth of July red, blond, and blue look. It seems Kate's found a new pal to join her at shows since she and Alexander Skarsgard recently announced their split. Lindsay Lohan was also in the crowd joined by her younger sister, Ali. Coldplay put on a 90-minute performance to benefit the Grammy Foundation's Grammy in the Schools music program. Chris Martin and his bandmates filled the set with their popular anthems "Viva La Vida" and "Yellow" as well as new songs like "Charlie Brown" and "Every Teardrop" from their forthcoming album. Coldplay capped off the show with a touching tribute to Amy Winehouse, breaking into a haunting rendition of "Rehab" during their three-song encore. Gwyneth Paltrow wasn't in the audience for last night's show, but she may be able to meet up with Chris tomorrow in Chicago, where the band is headlining the annual Lollapalooza music festival.