Gossip alarm: Seems like just yesterday that Avril burst onto the scene with the banal tween anthem "Sk8er Boi." Now she might have little sk8er boi or sk8er gurl of her own. TMZ has the speculative story: TMZ spotted Avril Lavigne and hubby rocker Deryck Whibley shopping up a storm on Robertson Blvd. yesterday ... but could it be for a wee Whiblet or Whiblette?

Consider the evidence: The couple dropped around $500 at Lisa Kline Kids, purchasing everything from a cheetah diaper bag to baby AC/DC tees, and, of course, a camo pacifier holder. Sounds a lot like she's preparing for life to get more complicated.

What's more, says a TMZ spy, "She definitely looks like she has a bump.