Madonna's daughter got a kiss from Beyonce at her concert last night (19.12.13).

The Queen of Pop was among the thousands of fans who enjoyed the latest stop on the 'XO' singer's 'Mrs. Carter Show' world tour at the Barclays Center in Brooklyn, New York, on Thursday and Beyonce even took a moment to acknowledge nine-year-old Mercy James, Madonna's adopted tot, and planted a big kiss on the forehead.

The 'Hung Up' singer documented the sweet moment on her Instagram account, captioning the picture: ''Mercy James gets a big fat one from the Queen. B! (sic)''

It appears pop royalty Madonna, 55, approves of her younger contemporary as she gave Beyonce, 32, a glowing review for her show-stopping concert.

She captioned another Instagram picture: ''Mrs. Carter crushes the BK with her bad ass show! Girls run the world! #srtforfreedom (sic)''

Mercy isn't Madonna's only child to get a moment in the spotlight this week as Lourdes, the star's 17-year-old daughter with Carlos Leon, played Betty Rizzo in her school's production of 'Grease'.

Proud parent Madonna - who also has 13-year-old son Rocco with ex-husband Guy Ritchie and adopted eight-year-old son David - celebrated with Lourdes and her friends following the LaGuardia High School production at the Hudson Hotel.