Celebrity couple Fergie and Josh Duhamel took a trip to Las Vegas this week for a wonderful night out.

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On Friday, People reported that the singer and her actor husband celebrated the birthday of Duhamel's sister Ashlee at Hakkasan in Vegas. An insider said the group had a blast sipping drinks and eating tasty dishes at the restaurant.

"They were laughing with one another and toasting throughout the evening," the source said.

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The night continued when the group went over to TAO Nightclub to dance and take photos at a VIP table. Fergie even made her way to the DJ's table so she could sing 'Happy Birthday' to Ashlee.

The site pointed out that Fergie and Duhamel will be celebrating another birthday soon- the couple's son, Axl, turns 2 on August 29th.

Speaking of little Axl, Duhamel previously told AOL that he and his wife have no plans to put their son in show business. But that might change if it turns out that's what Axl wants to do when he's older.

"Oh, I don't know about [putting him in show business]," the actor said. "I'm going to hold off on that for as long as possible. I want him to have a good education and a normal childhood first and if he wants to do it down the road he can, but we're not pushing him towards that."