Still in high school, 17-year old Joey Bada$$ already has a highly praised mixtape under his belt and now, he has a national T.V. performance as well. Performing his hit song "Waves" last night on NBC's Late Night with Jimmy Fallon, Joey's smooth flow was perfectly complemented by The Roots' live instrumentals. Pro.Era's mixtape will be released on December 21 and fans are already excited for the next solo piece this young gun has cooking. Check out the video above.