Why Did Avril Lavigne Buy a Diaper Bag?

Is Avril Lavgine preggers?

The 23-year-old pop star and husband Deryck Whibley, 27, have been dogged by rumors recently that they’re expecting their first baby. And they didn’t do much to squash the pregnancy talk during a shopping trip yesterday along trendy Robertson Boulevard.

Lavigne and Whibley, who have been married since July 2006, were spotted dropping into Petit Trésor and then Lisa Kline Kids, where they spent about $500 on baby gear.

I’m told they picked up a cheetah-print diaper bag at Lisa Kline, along with a Sassy pacifier holder, a charcoal gray baby tee emblazoned with the logo of rock band AC/DC and a white Splendid romper.

“They shopped holding hands and picked stuff out together,” an onlooker reports.

At Petit Trésor, according to a source, they picked up a Petunia Pickle Bottom men's diaper bag and two organic Robbie Adrian baby blankets.