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?
