A former “American Idol” contestant charged with raping a minor creepily fronted a band called Sexual Harassment after he was booted from the reality show — twice.

Randy Madden, 45, started the presciently named group after he failed to gain a single “yes” from the “American Idol” judges in 2008 when he tried to wow them with a performance of Bon Jovi’s “Livin’ on a Prayer,” which Simon Cowell savagely cut off after about 20 seconds.

The Californian was a 27-year-old with tattoos and bandanas and a resume that included cubicle work as a sales rep and no time playing in bands, so Paula Abdul and the other judges encouraged him to cut his teeth onstage if he wanted to make a go as a rocker.

He apparently took that advice to heart and started a band — which he eerily decided to call Sexu

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