Watch: fun. debuts new song, “Harsh Lights,” on Jimmy Fallon

On Wednesday night, fun. debuted the new song, "Harsh Lights," during the special Orlando edition of "The Tonight Show Starring Jimmy Fallon." Armed with a gold microphone and a delicious Grease-style, T-Birds silk jacket, Nate Ruess wooed the geeky crowd with hipster dance moves, leather loafers and lyrics filled with “whoas” and dreams of “slipping into midnight.” “The Tonight Show” is in Orlando this week promoting the nerd’s dream/expansion of Diagon Alley in the Harry Potter theme park.

Watch Of Monsters and Men play Leno before invading Colorado

Of Monsters and Men will be descending on the Boulder/Denver area for the next two days. But before they arrived this week, the Icelandic folk-rock revivalists took over the "Chin's" stage at "the Tonight Show" to perform "Mountain Song" (check it at the 37:41 mark) off of their fast moving album, "My Head is an Animal." Look for the quintet to storm the Boulder Theater this evening (SOLD OUT) and open for fun. tomorrow at the 1stBank Center (SOLD OUT) as part of KTCL's Not So Silent with local favorites, Churchill.