Canadian teen sensation Justin Bieber has been slapped with a bizarre lawsuit by an unnamed man in Michigan who describes himself as an 'emotional mess'.

In court papers obtained by the celebrity gossip website TMZ, the man makes over-the-top and obviously untrue allegations about Bieber and his mentor Usher and even claims to be the father of Bieber's girlfriend, Selena Gomez:

"Bieber has cost me $426.78 and never paid me back. This money was used as abortion money because Justin Bieber got my daughter Selena pregnant in my bedroom, on my canadian bear rug."

"Usher Raymond came to my house on the forth of july 2012 and s*domized me with a firework and lit it inside my an*l area while blaring kate perry [sic] firework song in my ear drums."

The lawsuit continues: "[Bieber] gave selena a std and Bieber stole my credit card to buy him and sean p-ditty cmobs cocaine to use in drug free school zones. Bieber also got a penis enlargement with my stolen american express card."

Perhaps even more shocking is the end of the document, which reads: "I'm an emotional mess ... America must boycott biebers music."

Meanwhile, the 'Boyfriend' superstar doesn't appear to be phased by the odd news as he took to his official Twitter page earlier this afternoon (October 23) and promised his followers a night to remember: "I got a VERY SPECIAL surprise for the CHICAGO show today. this is gonna be a night no one is going to forget. #BELIEVEtour"