Tonight Show With Jimmy Fallon March 7, 2020 3:52 am ‘Tonight': Fittest of the Fit Challenge With Carrie Underwood Carrie Underwood and Jimmy Fallon compete against each other in a series of exercise games to determine who is the fittest of the fit. US & World Videos 7:10 Taylor Swift shares the meanings behind ‘Florida,' ‘Fortnight,' and others from her ‘TTPD' album 1:51 All the Easter eggs Taylor Swift dropped before releasing ‘Tortured Poets' 3:30 South Africa's ‘Black Mermaid' inspires kids with new book 15:49 Kelly Clarkson pitches TV show for Maren Morris & Karina Argow's new children's book 6:56 Valerie Bertinelli & Kelly Clarkson guess ice cream flavors blindfolded with Fortune Feimster