Watch Seth MacFarlane Try So Hard Not to Laugh While Singing Yahoo Answers With Jimmy Fallon

Ever wondered if a veterinarian can tell how many lives a cat has left? On Tuesday night, Seth MacFarlane dropped by The Tonight Show and answered that very question along with several others you've probably been wondering about, but with a fun twist. With the help of Jimmy Fallon, Seth sung the replies to hilarious real-life queries from Yahoo Answers complete with a grand piano. Watch the clip above and find out how Hanukkah is really spelled before diving into Seth's impressive celebrity impressions.