The Mex Factor! Britney Spears spends a chilled-out Cinco de Mayo holiday at home with her family

By ANDREA MAGRATH

PUBLISHED: 13:24 GMT, 7 May 2012 | UPDATED: 13:30 GMT, 7 May 2012

She may be about to make (yet another) spectacular return to the

spotlight as a judge on X Factor USA, but Britney Spears is still just a family girl at heart.

Despite the endless invitations for Hollywood parties that surely come her way, the singer, 30, opted to celebrate Cinco de Mayo at home with her close knit clan over the weekend.

The Womanizer hitmaker and the Spears family were pictured enjoying a casual party at a house in Brentwood, California.

Holiday at home: Britney Spears celebrated Cinco de Mayo at a house in Brentwood, California with her family

In typical style, Britney put comfort ahead of fashion, wearing a red midriff T-shirt, and loose-fitting denim cut-off shorts.

The star wandered around barefoot and for much of the day with her fly unzipped as the family marked the Mexican holiday, a popular celebration in California.

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