Jessica Biel and Justin Timberlake leave Whole Foods Market in Brentwood, California after grocery shopping for the Fourth of July. (WENN.COM photo)

Justin Timberlake and Jessica Biel dismissed rumours of a break-up with a holiday shopping trip on Independence day.

The pop star and his Hollywood beauty have been dogged by speculation about their romance in recent weeks, with Internet gossips claiming the couple is no longer together.

Just last month, Timberlake was defended by New York nightclub owners after he was accused of drunkenly chatting to a mystery woman at city hotspot Avenue.

But photographs of the pair picking up groceries on America's biggest barbecue day of the year and grabbing a bite to eat in Hollywood on Saturday have put split rumours to rest.

Biel was first linked to the singer in 2007, after he ended his romance with actress Cameron Diaz.