Britney Spears 'turned up her performance' for sons at new ad shoot

Washington, Apr 18 (ANI): Britney Spears, who recently recorded a commercial for Hasbro's new interactive game Twister Dance, performed really well in the shoot, according to director Ray Kay.

The 30-year-old was in high spirits as fiance Jason Trawick and her sons visited her on the set.

"The shoot went really smooth," Us magazine quoted Kay as saying.

"Britney always delivers, and we had a good time on set. She brought Jason Trawick and the boys to set, and it was really great to see how her performance was stellar when the boys were watching the monitor. It's like she turned up the performance one notch more."

Spears, mom to Sean, 6, and Jayden, 5, sported a 20,000 dollars BodyRock Sport by Kelly Dooley sports bra for the ad, which was adorned with 18K gold hardware and embellished with Swarovski crystals.

Kay insisted that the engaged singer was "very professional" during the shoot.

"I think the reason Britney's been able to stay on top for such a long while is that she's renewed herself, trying out different kinds of music and expressions throughout the years," Kay said.

"She's simply an interesting character," Kay added. (ANI)