Who says that rehab can't be fun? Seemingly taking a break from a clinic in California for an addiction to pain killers, rubber-lipped Aerosmith frontman Steven Tyler was engaged in a bizarre incident last weekend when he treated shoppers at the Rancho Mirage branch of hardware store Home Depot to a capella renditions of 'Dude Looks Like a Lady' and 'I Don't Want to Miss a Thing.'

TMZ reports that instead of asking for a price check or calling for assistance at the check-out counter, the singer used the store's loudspeaker speaker for his renditions. And if that wasn't enough, Tyler is then reported to have taken several hits from a helium tank before singing in a high-pitched Bee Gees-style voice.

Proving himself to be a good sport and all-round decent chap, Tyler then signed autographs for anybody who wanted one, it's reported.

All of which begs the question as to why Tyler's Aerosmith bandmates are reportedly bothering to audition for a new singer. As if to prove the point, the singer last week sang his own 'I Don't Want To Miss A Thing' at a karaoke night in a pub in Palm Springs after two punters were booed off stage for making a hash of the song.