Avril Lavigne Betsey Johnson West Hollywood shopping smiles

We're not sure if it's something Brody Jenner is doing to her or the fact that she just picked up some goodies at Betsey Johnson (gratis, no doubt), but Avril Lavigne was on cloud nine yesterday afternoon when we caught her leaving the WeHo store.

The starlet isn't known for being particularly friendly, and while we're not loving the shlumpy outfit, that smile definitely looks good on her pretty face!