Right, 4 contestants left on this 10th Season of American Idol and the celebrities started dropping by. While the guest performances from celebs during results show were raining on the show, the mentors will not let themselves get outnumbered by it. Last week’s mentor is Sheryl Crow, and for this week it’ll be Lady Gaga mentoring American Idol Season 10′s TOP 4 (James Durbin, Scotty McCreery, Lauren Alaina, and Haley Reinhart. I wonder what she’ll be ‘mentoring’ to these Top 4 contestants. Singing maybe?

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