The “Toxic” singer posted a clip of the 18-year-old freestyle-rapping while swaying around the foyer of her $7.4 million Thousand Oaks, Calif., mansion.

Britney Spears says son Jayden, 18, is a "genius" after he plays the piano for her, adding that she "can't believe he's mine." The singer shares her sons, Jayden and Sean, 19, with ex Kevin Federline.

Britney Spears is exactly one of those proud mamas, as evidenced by a pair of Instagram clips she posted on Tuesday (March 11) of her youngest, 18-year-old son Jayden James, showing off his piano-playing and mumble rapping skills.

Britney Spears is “in awe” of her son Jayden! On Monday, March 10, the pop star shared an Instagram video of the 18-year-old showing off his impressive piano skills while at her house, as well as one where she praises him after his performance.

Britney Spears shares rare glimpse of 'genius' son Jayden rappingSource: Britney Spears

Britney Spears flaunted her son Jayden’s piano skills in a new Instagram video, claiming she was “in awe” of him and called him a “genius.” Spears, who shares her two sons with her ex-husband Kevin Federline,

Britney Spears raved about her son, Jayden James' piano skills in a rare video. On Monday night, the pop icon took to her Instagram page to share the clip, which shows the 18-year-old playing the piano in her home.