In her behind-the-scenes video, fans get a taste of Lea's awesome showtune cover as she shoots different scenes for the commercial. The ad is to promote Dove's hair care line of shampoos and conditioners.
"I started performing on Broadway at eight years old and entertaining continues to be one of my favorite things, but the grueling 'Glee' rehearsals and filming cause me to do an array of damage to my hair," Lea said in a press release.
A teaser of the commercial will air during the season finale of American Idol on May 25 at 8 p.m. ET. The extended version, featuring Lea's solo, will then be available on Dove's website. Dove is also holding a sweepstakes for a chance to tour the 'Glee' set. Visit DoveGleeForAll.com for all the details, and watch Lea's full behind-the-scenes video from her commercial shoot after the jump.