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Less than a month after divorce with Avril Lavigne, SUM 41 leader Deryck Whibley hit the town in Las Vegas Friday night.
He celebrated the 20th anniversary of The Mirage where he was accompanied by model/designer Hanna Beth Merjos.

Following dinner at Stack – which Whibley and Merjos entered hand-in-hand – the pair then headed to the Slash and Friends show, which featured a performance by the Guns N' Roses guitarist, as well as Tommy Lee and Daughtry.

A rep for Whibley tells PEOPLE: "Deryck is in Las Vegas celebrating a friend's opening with a group of his close friends, including his best friend Rob Dipple and Rob's girlfriend."

It's a useful connection. It seems after divorce with Avril guy slightly neglected himself. Don't you think so?