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OTRC: Britney Spears rides motocross bike with son (see photos)

Britney Spears appears at 102.7 KIIS FM's Wango Tango concert in Los Angeles, California on May 11, 2013. Britney Spears appears with her son in a photo posted on her official Instagram page Sept. 25, 2013. (Kelly A. Swift / startraksphoto.com / instagram.com/britneyspears)

Britney Spears took a break from preparing for her Las Vegas residency show to celebrate her sons birthdays.

The 31-year-old singer celebrated the birthdays of her sons Sean Preston, 8, and Jayden James, 7, earlier this week with a motocross-themed party, complete with dirt bikes and racer flags.

Spears shared a picture on her official Instagram page on Sept. 25 of herself with her son Jayden riding a motocross vehicle. She captioned the photo, "My little future motor crosser and I ripping up the track. At 5 MPH! Yee haw! Much love to @foxpetefox :)."

The singer shared another Instagram photo of her two sons earlier in the week celebrating their birthday in full motocross gear, saying, "Best way to celebrate a birthday!!! My boys are looking good in their @foxracing gear." The photo can be viewed below.

In between celebrating her sons birthdays, Spears recently confirmed her highly anticipated Las Vegas residency show, titled "Britney: Piece of Me" on Good Morning America.

She says the show will be a hybrid of theater-meets-nightclub, telling GMA, "We wanted the environment to be that way so people could come and have a good time and stand up and feel like they're in the show with me. I love Vegas. The energy here is really, really good."

Spears will also release her eighth studio album, which is yet to be titled, on Dec. 3, featuring her hit single "Work B----."

Check out a photo of Spears' sons Sean Preston and Jayden James celebrating their birthdays below.

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