WENN
According to the New York Daily News, the couple fought after Lavigne "kept downing vodka" at a Los Angeles nightclub.
However, a new source has denied the allegations insisting that the pop singer, 24, and the Sum 41 frontman are still happy together.
"Avril had a surprise BBQ at the house for him and 20 friends for his birthday [at the weekend]," an insider told Us Weekly.
"They then rented a limo and went to [L.A. club] MyHouse...They were laughing and cuddling all night."
