Christina Aguilera is reportedly keen to get her pre-baby body back in time for her birthday on December 18.
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The 33-year-old singer only gave birth to her daughter Summer Rain two weeks ago but she's reportedly already thinking about getting her pre-baby figure back.
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A source said: "She thinks there's no time to lose. Her target is
to have her pre-pregnancy body back in time for her birthday on December 18."
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The blonde beauty will have to wait another four weeks before she can participate in exercise as she delivered Summer via Caesarean section.
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However, the 'Candyman' hitmaker has wasted no time kick-starting her high-protein diet and is allegedly keen to be ready to pose for Playboy magazine next year.
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The source added to the US' OK! magazine: "Stripping down is totally her style."
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The 'Voice' USA mentor bared her baby bump in V magazine before she and her fiancé Matthew Rutler welcomed their little girl into the world, and she admitted she was very "proud" of her changing figure.
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She said at the time: "As a woman, I'm proud to embrace my body through all stages of life, staying fearless and confident in surrendering to the unknowns the future has in store."
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Christina also has six-year-old son Max with ex-husband Jordan Bratman, whom she divorced in 2011.
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