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


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

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UPDATED:

19:40 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

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.

The date is marked as a celebration of Mexican pride by the U.S. large population of Mexicans.

She threw her bleached blonde bedhead hair up into a messy bun later in the day.

Despite her somewhat unkempt appearance, Spears' outfit choice showed off an enviably flat stomach.

Comfy and casual: The singer wore a red midriff-baring T-shirt and denim cut-off shorts to the party

Comfy and casual: The singer wore a red midriff-baring T-shirt and denim cut-off shorts to the party

Comfy and casual: The singer wore a red midriff-baring T-shirt and denim cut-off shorts to the party

Party mood: Britney was snapped laughing with friends on the balcony of the house

Party mood: Britney was snapped laughing with friends on the balcony of the house

Britney was clearly at ease in her environment, and was spotted casually yawning and stretching on the balcony of the house.

She laughed and joked around with friends and family and cuddled up to her nieces.

Her own children, Sean Preston and Jayden James, were nowhere in sight and were presumably with their father, Kevin Federline for the weekend.

Stretch! She showed off her flat stomach as she raised her arms in the air

Stretch! She showed off her flat stomach as she raised her arms in the air

Stretch! She showed off her flat stomach as she raised her arms in the air

Family time: Britney cuddled up to her nieces at the party, but her own sons were nowhere in sight

Family time: Britney cuddled up to her nieces at the party, but her own sons were nowhere in sight

According to reports, Britney is gearing up to appear as a judge on the second season of The X Factor USA after Paula Abdul and Nicole Scherzinger were dropped.

Spears is believed to have been offered a $15million deal to star alongside Simon Cowell and L.A. Reid.

While X Factor bosses continue to refuse to comment on who the new judges are, Britney is widely believed to have already signed on.

Family affair: Britney's siblings Jamie Lynn and Bryan James and their children, and her father were all in attendance

Family affair: Britney's siblings Jamie Lynn and Bryan James and their children, and her father were all in attendance

Outfit change: Jamie Lynn's daughter Maddie left the party in a different outfit

Outfit change: Jamie Lynn's daughter Maddie left the party in a different outfit

Speculation has now turned to the fourth judge, and reports today suggest that Demi Lovato has edged out Miley Cyrus as the frontrunner for the job – largely thanks to Britney's input.

RadarOnline alleges that Britney is 'hopeful that Demi will become
one of the judges because she truly admires her.

'Britney loves how open
and honest Demi has been with her fans after she went to rehab last
year,' the website claims. 'She thinks they
have a lot in common and that they would have great chemistry on the
show.'

Boys club: Bryan and James had a chat outside the house

Boys club: Bryan and James had a chat outside the house