Giuliana and Bill Rancic Battle It Out: Who Knows Duke Better? Watch and Find Out!

Which parent do you think won the game?

Nothing better than a fun little game, right?

During their appearance on E! News tonight, Giuliana and Bill Rancic were put to the test after Catt Sadler quizzed the two lovebirds to see who knows their son Duke better. These two parents had to try and answer a variety of questions about their little handsome man, from his favorite food to his favorite toy and favorite color.

So who ended up knowing the little cutie better? You gotta watch the clip to find out!