Sophia Grace and Rosie Grill Justin Bieber on "The Ellen DeGeneres Show"

Facebook.com/JustinBieberEllen DeGeneres interviewing Justin Bieber herself is so five minutes ago -- now she's farming out the job.  During The Bieb's appearance Friday on Ellen's show, she stepped back and let her intrepid girl reporters,  Sophia Grace and Rosie, interview the star instead.

During the, er, hard-hitting interview, the two British girls hammered Justin, getting him to reveal...what his favorite kind of cake and cookies are.  His answers?  Ice cream cake and oatmeal raisin.  Shocker!

Rosie, the quieter of the two girls, also asked Justin what he likes to do with his friends.

"I like to go bowling.  I like to watch movies with my friends," Justin said with a smile.  The girls were excited to share with Justin their own favorite things, telling him, "We play Barbies," and, "We like to play hide and seek."  "Nice," said Justin, playing along.   Sophia Grace and Rosie also serenaded Justin with his own hit, "Baby."

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