Grab your comfiest blanket and favorite PJs and find a good spot in front of the computer. The nation’s largest annual bedtime story event, America’s Biggest Bedtime Story, is back for its fourth year featuring one of the world’s most recognizable superstars.

Book It!, the reading incentive program sponsored by Pizza Hut, is teaming up with Grammy nominated R&B/pop singing sensation Justin Bieber as this year’s celebrity reader to motivate children to read more and help them develop a lifelong love of reading. Children, parents and teachers are encouraged to join the online webcast of Justin’s reading available all day starting at 8 a.m. Feb. 15. 

Justin will read his favorite childhood book, Dr. Seuss’s classic The Cat in the Hat. There will be additional activities, a chance to win prizes and tips on how to raise a reader.

Last year approximately 215,000 people joined the webcast, setting a new record for the event. Pizza Hut is challenging classrooms and families across America to join the 2011 event. If total attendance surpasses last year’s attendance record, Book It! will donate $25,000 to the Pencils of Promise charity. Supported by Justin Bieber, Pencils of Promise is a global movement that partners with local communities to build schools in the developing world. 

Readers can join in by visiting starting at 8 a.m. Feb. 15. The webcast will be available online until 11:59 p.m. Feb. 18.