Jimmy challenges hip-hop lover Daniel Radcliffe to rap Blackalicious' tongue-twisting "Alphabet Aerobics."

Subscribe NOW to The Tonight Show Starring Jimmy Fallon: http://bit.ly/1nwT1aN

Watch The Tonight Show Starring Jimmy Fallon Weeknights 11:35/10:35c

Get more Jimmy Fallon:
Follow Jimmy:   / jimmyfallon  
Like Jimmy:   / jimmyfallon  

Get more The Tonight Show Starring Jimmy Fallon:
Follow The Tonight Show:   / fallontonight  
Like The Tonight Show:   / fallontonight  
The Tonight Show Tumblr:   / fallontonight  

Get more NBC:
NBC YouTube: http://bit.ly/1dM1qBH
Like NBC:   / nbc  
Follow NBC:   / nbc  
NBC Tumblr:   / nbctv  

The Tonight Show Starring Jimmy Fallon features hilarious highlights from the show including: comedy sketches, music parodies, celebrity interviews, ridiculous games, and, of course, Jimmy's Thank You Notes and hashtags! You'll also find behind the scenes videos and other great web exclusives.

Daniel Radcliffe Raps Blackalicious' "Alphabet Aerobics"
   / fallontonight