avrilnipslipbeach.jpgAvril Lavigne beach ocean swimming waves smoking hat singer

Yesterday Avril Lavigne hit the beach with some pals, and not only did she have a nip slip, but we caught her acting awfully flirty with a beefy guy who was most definitely NOT her boyfriend Brody Jenner!

Is Av just third wheeling with her friend's boy toy, or is she looking for a fling on the side? We're not sure what Brody would think of these shots, but at least his gf looks hot, right?

Avril Lavigne beach ocean swimming waves smoking hat singer