Sheryl Crow might be a little too busy for any fun-having and sun-soaking in the foreseeable future.

The 45-year-old singer/songwriter announced on her website today that she has adopted a baby boy.

A source close to Sheryl tells Us, “She’s super happy. He was born two weeks ago, and she’s just over the moon.”

The singer’s rep confirms that the adoption is a done deal.

Crow, whose engagement to Tour de France champ/McConaughey BFF, Lance Armstrong, was called off in ...