Sometimes it takes a while to get back up to speed after a long weekend. Even when it comes to musical performances on the late-night chat shows. The Tonight Show Starring Jimmy Fallon has the only clip online today: California R&B singer-songwriter H.E.R. performing her latest single As I Am. Thankfully, Jimmy Kimmel Live comes to the rescue with the latest musical edition of Mean Tweets, featuring Gwen Stefani, Pink, Nickelback, Miley Cyrus, Korn and plenty of other worthy recipients. And as always, Last Call With Carson Daly offers up a double shot of tunes, with Red Rideresque indie-rockers Houndmouth playing Golden Age and Modern Love.