Britney Spears' Fiance Jason Trawick 'Auditions' For 'The X Factor'

It's clear that Jason Trawick is confident in his ability to charm his fiancee and ladylove of over two years, Britney Spears, but there appear to be limits to new X Factor judge Spears' devotions.

Trawick posted a video of himself informally singing Night Ranger's 1984 hit, "Sister Christian," to Spears in the car as he drove her to X Factor auditions in San Francisco. "Rode in my 1st @Uber to @TheXFactorUSA auditions inSF today!" Spears tweeted. "Jason auditioned for me — I wouldn't put him through …," she joked on Twitter.

Trawick was anything but discouraged, however. He posted a second video of himself singing an altered version of REO Speedwagon's "Keep on Loving You" for Spears, prefacing his performance by swearing to show Spears that he has "the X Factor."

After the video shows Trawick sing a few bars of his little ditty, Spears can be heard saying, "still no!" in the background. She later took to Twitter again, pleading with followers to post their videos to Viddy.com, "Please send in ur best dance Viddys so Jason will stop!"

The X Factor returns, with Demi Lovato and Spears debuting as judges (replacing last season's Nicole Scherzinger and Paula Abdul), alongside mainstays L.A. Reid and Simon Cowell, on September 12 on Fox.

For more on The X Factor and Britney Spears:

Britney Spears Takes The Stage

Britney Spears Close To Joining 'X Factor' Panel

Britney Spears, Demi Lovato Will Judge 'The X Factor'

Paula Abdul, Nicole Scherzinger, Steve Jones Not Returning To X-Factor

U Blog: The X-Factor — Simon Cowell Thinks We're All Just Sheep

VIDEO: Contestant Drops Pants At The X Factor Premiere

SPOILERS: 'X-Factor' Judges Talk Finale

Simon Cowell Wants Paula Adbul As 'X-Factor' Judge

Who Is 'X-Factor' Host Steve Jones

Simon Cowell And Paula Abdul Clown Around At 'X-Factor Premiere

Simon Lines Up Paula For 'X-Factor'

VIDEO: 'Glee' Rocks 'X-Factor'

Mariah Carey Gets Gig On Simon Cowell's 'X-Factor'

RECAP: Paula Abdul Says She Sees Ghosts On 'X-Factor'