Cyrus230No2.jpgMiley Cyrus will appear as a mentor on American Idol Wednesday night, E! News reports.

Cyrus will be guiding contestant Lauren Alaina, who sang Cyrus' "The Climb" a few weeks ago, in her climb to the top. She taped the mentoring session last week.

But Miley's appearance on Idol isn't just for fun - see what rude remark sparked her to do the show after the jump!