BritBrit is having a blast!

The popstar is having some fun in the sun on her Hawaiian vacation. The 33-year-old brought her two sons Sean Preston, 9, and Jayden James, 8, as well as her new man, Charlie Ebersol, on beachy vacation to the Aloha state and from the look of things -- they are having the time of their lives.

The mom posted an Instagram pic from her sunny and smiley vacay. The "I'm A Slave 4 U" singer posed with son Jayden, as the mother/son duo help up inner tubes. The blonde bombshell has been running around in a Victoria's Secret bikini, which cost a mere $48.50!

We have a feeling that Chuckles was loving Brit's teeny bikini!

Brit and Charlie have only been dating for six months but things seem to be going well for the couple. In the latest issue of People mag, the "Toxic" singer admitted that she would "love" to walk down the aisle again and even referred to Charlie as "amazing."

We are still on the fence about Charlie (we just want someone who will be good to BritBrit!) -- but we definitely think he's a super hottie. So that's a score for Ms. Spears. Plus anyone is better than those losers David Lucado and Kevin Federline!