Avril and Deryck out on 12/5/08. Credit: WENN.com

Avril Lavigne is one singer who has not learned to change with the times. The 24-year-old is still hawking the same stale style of clothing she was when her line Abbey Dawn first came out, and she’s still doing the whole punk-rock-ballerina look with the heavy mascara and studded hoodies. And her marriage is still on the rocks.

According to the NY Daily News, Avril was treating her husband, Deryck Whibley from Sum 41, with little more than indifference while she got trashed at a nightclub in LA.

The Canadian singer was “getting bombed” at MyHouse in L.A. last weekend, says a spy. “She kept downing vodka drinks, to the point where she was obliterated. She ended up fighting with her husband (Deryck Whibley of Sum 41 fame) before ignoring him completely.”

While Whibley sat alone on the couch glumly, “­Avril talked to everyone else. When he was ready to leave, she downed two more shots of vodka before walking out the door. What a child!”

[from NY Daily News]

Avril’s fifteen minutes of fame have been over for quite some time, but she’s still hanging on for dear life. Although her catchy song “Girlfriend” was a hit, she was criticized when her fans tried to make it the YouTube top hit through devious means. Her 2008 The Best Damn Tour was decidedly not a hit, and she’s getting more press for her failing relationship than for her music. In an interview a few years back, Avril commented on what a homebody she is – but for someone who prides herself on being a homebody, she sure goes out a lot. Her partying has led to rumors that she’s been cheating on Deryck for a while now, and Brandon Davis’ name has come up more than a few times. Deryck has also been rumored to be getting some on the side. Either Avril and Deryck have a very open relationship, or we’re going to get another Avril album full of breakup songs.

Note by Celebitchy: US Weekly reports that this isn’t true, and that the two were “laughing and cuddling all night.” I bet their source was someone from Avril’s PR firm.

Avril and Deryck are shown in the header outside Bar Deluxe in LA on 12/5/08. She is also shown outside clubs in London on 3/18/08 and 3/19/09. Credit: WENN.com