"American Idol" runner-up Adam Lambert will mentor the show's current crop of contestants next Tuesday (Apr. 13) and perform his single "Whataya Want from Me" on the following night's results show, a representative for 19 Entertainment confirmed today (Apr. 6).

The spokesperson first confirmed Lambert's return to "Idol" to EW, and the glam-pop singer later tweeted the news directly to his fans. "It's true!" he wrote. "In addition to performing on Idol April 14th, I will be mentoring the top 8 on the 13th. I feel honored to be asked." While the theme for next week's performance show has not yet been announced, tonight's top nine contestants will tackle the John Lennon/Paul McCartney songbook.

Though "American Idol" mentors typically have decades of success under their belts, the show has been using younger artists this season. Miley Cyrus and Usher mentored the contestants through their Billboard No. 1s and R&B/soul-themed performances, and Katy Perry, Joe Jonas and Avril Lavigne served as guest judges during the early audition rounds.

While Lambert is less experienced than those artists -- it's been less than a year since he transitioned from "American Idol" hopeful to 19/RCA-signed recording artist -- the 28-year-old seems confident that he'll have useful advice for those hoping to follow in his footsteps. "Even though I'm just at the start of my recording career, I hope to lend some insight as one who's been thru the Idol adventure." Lambert said on Twitter. "Excited!!"

Lambert also announced that he'll release a new EP containing remixes of his first two singles -- "For Your Entertainment" and "Whataya Want from Me" -- and a third track from his debut album entitled "Voodoo." The "Remixes" EP will be released on Lambert's Web site adamofficial.com Apr. 9 and to digital retailers Apr. 13, the same night of his return to "Idol."

Alluding indirectly to his controversial performance at the American Music Awards back in November, Lambert promised fans that he'll keep next week's "Idol" appearance PG-rated. "Don't worry America," Lambert tweeted. "I will be beyond family friendly. Relax and enjoy. For Your Entertainment."