Britney Spears Demi Lovato X Factor Pictures in Oakland

The X Factor crew traveled to San Francisco today for their latest round of auditions. Britney Spears, in a Lorena Sarbu dress, had fiancé Jason Trawick with her for the first day at Oracle Arena in Oakland, CA. They arrived at the stadium by UberCab, and Britney tweeted about the ride and joked about Jason's singing skills, writing, "Rode in my first Uber to The X Factor auditions in SF today! Jason auditioned for me — I wouldn't put him through . . . " L.A. Reid and Demi Lovato, who showed off new pink accents in her hair, were also on hand to judge the talent. Simon Cowell made his return to work after a bout of bronchitis that kept him from attending the Kansas City, MO, tapings. Simon teased Demi and Britney by introducing them as "superbrats," though the ladies gave it right back to Simon during the all-day taping.

Britney and her kindred judges will stay in the Bay Area until Monday, when they'll take a break before returning to the road with stops in Rhode Island and North Carolina through July.