Britney Spears' sons embarrassed to kiss mom

Singer Britney Spears' kids are embarrassed of kissing her in front of their friends.

The 31-year-old singer admitted Sean Preston, 7, and Jayden James, 6, from her marriage to dancer-rapper Kevin Federline, don't like to kiss her in front of their friends because they don't think it's "cool", reports contactmusic.com.

"My sons are six and seven, so they're just now getting to the stage of where you can't kiss mommy in front of your friends and all that kind of stuff. They're getting what's cool and what's not," said the 31-year-old.

Meanwhile Speras has recorded new song "Ooh la la" for "Smurfs 2" because her sons are huge fans of the cartoon.

She said: "The main reason why I did it was because of my boys - they're obsessed with 'The Smurfs'. We've seen 'The Smurfs' movie a million, trillion times and they were told they could be in the music video."

"My oldest son, Preston, was right on cue every time they would tell him to do something in the video. They play themselves. But when we did the actual shoot of the video, I didn't see them. I was in hair and makeup, so later on I got to see what they actually did on camera - and it was adorable," she added.