Which Famous Pop Star Shared Her Adorable Ultrasound Picture? (PHOTO) 1 of 2 Prev Autoplay Next Tweet December 6, 2012 at 04:53PM EST by Rachel McRady Related: The Voice, Guess Who? full size Credit: Twitter Guess the Celeb! This world-famous pop star is now expecting her first child, and she and her soccer star boyfriend couldn’t be more excited about it. The couple has been tweeting non-stop pregnancy pics, and today, this caliente chica’s novio shared an ultrasound photo of their growing little boy.He looks small and humble, just like some of this superstar’s other assets. Can you guess the pop star? Click on for the reveal!