Christina Aguilera has shared the first photo of her baby daughter online.

The 'Fighter' hitmaker gave birth to Summer Rain - her first child with fiance Matthew Rutler - on August 16 but it has taken until this weekend for fans to get a glimpse at the little girl.

Posting a picture of Summer wearing a bright pink dress and white pants bearing the slogan 'Lil Diva', she wrote on Twitter: "Watch out...another one's getting ready to conquer the world! #driven #diva2 (sic)"

The 34-year-old singer - who also has seven-year-old son Max from her marriage to Jordan Bratman - recently admitted she is a very different person when at home with her kids to when she is performing on stage.

She said: "When I'm home, I'm in my sweatpants getting cosy with my children. There are two sides to me; the person who will cuddle in bed and sing my kids to sleep and the persona who goes out onstage - the extrovert and the artist. It's important for me to express that side of myself. There aren't as many opportunities, but I make sure to get dressed up and be glamorous. Whether I add some eye make-up, wear a special fragrance or try a fun new nail colour - anything feminine and sexy."