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"Britney Spears has celebrated her son Jayden Federline&amp;#039;s seventh birthday. The 31-year-old singer uploaded a photo on Instagram showing her and her son riding a quad bike.  &amp;quot;My little future motor crosser and I ripping up the track....At 5 MPH! Yee haw!&amp;quot; she wrote with the picture. Later, she added a photo of Jayden and older brother Sean Preston wearing biker gear while posing next to a yellow birthday cake. &amp;quot;Best way to celebrate a birthday!!! My boys are looking good in their @foxracing gear!&amp;quot; the singer added. Spears recently announced a residency at Las Vegas over the next two years, which is said to have sold almost all of its available tickets. She will release her new single &amp;#039;Work Bitch&amp;#039; in the UK on November 3, while it is already available to download everywhere else around the world. Listen to Britney Spears&amp;#039;s new single &amp;#039;Work Bitch&amp;#039; in full below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/showbiz/news/a519234/britney-spears-rides-quad-bike-with-son-jayden-picture/>