EXCLUSIVE: Radar Reveals Real Reason Troubled Britney Spears Decided to Sell Her Entire Music Catalog for $200Million

Spears is mother to Preston, 20, and Jayden, 19, with her former husband, Kevin Federline. She is understood to be "delighted" with her catalog sale and has been celebrating by spending time with her sons.

Despite the money-making potential of the gigs, Spears last month vowed to "never perform in the US again."

In an Instagram post referring to her habit of dancing scantily-clad for the camera and to her son's piano skills, she explained: "Sending this piano to my son this year!!! ... interestingly enough, I dance on Instagram to heal things in my body that people have no idea about. Yup and it's embarrassing sometimes… but I walked through the fire to save my life...

"I will never perform in the U.S. again because of extremely sensitive reasons, but I hope to be sitting on a stool with a red rose i n my hair, in a bun, performing with my son… in the UK and AUSTRALIA very soon. He's a huge star, and I'm so humbled to be in his presence!!! God speed, little man!!!"

She has shared a video of Jayden playing piano and said of her son: "I'm in awe of him. I can't believe he's mine!!! I was honestly scared that's not normal!!!"