Avril Lavigne Rocks Out on Red Carpet (PHOTOS)

We heart Avril Lavigne’s sassy attitude. The pop rocker partied “Dawn” in Vegas — celebrating the success of her clothing line Abbey Dawn. 

The feisty designer stuck out her tongue and strutted her stuff while hitting up the press line at the official after party at Pure Nightclub inside Ceaser’s Palace in Las Vegas.

Avril will also be showing her collection during New York fashion week –and she’s adding brand-new items to her exclusive clothing line.

For the first time, she will be doing a full men’s line! She will also be adding dresses, denim, skirts, footwear, handbags, wallets, purses and eye wear to her already popular lineup of tee-shirts, hoodies and jewelry (sold only at AbbeyDawn.com). 

Avril also has a fragrance out (Wild Rose) an album on the charts, a new video coming soon for “Wish You Were Here” — and who can forget about her hot boyfriend Brody Jenner? This girl has got it going on! 

After partying it up at Kim Kardashians wedding on Saturday, the couple flew straight to Vegas to celebrate his 28th birthday at The Bank Nightclub at the Bellagio. Proving that he was ready to get back on the waves after his surfing accident in May, he and Avril were spotted recently shopping for new surfing equipment.