Taylor flew to Las Vegas last Friday to support her boyfriend Calvin Harris at his show at Hakkasan Nightclub.
More than just your average mosher, Taylor lip-synced along to one of his biggest hits, 'We Found Love', sung originally by Rihanna.
The singer bumped into Todrick Hall at the show - the YouTube star was a semi-finalist on the ninth season of American Idol and has since become an internet sensation. The duo made a fun video of themselves together, which Todrick posted on his Instagram account.
Taylor appears to be putting in a little more effort than Todrick (who does, understandably, have to hold the phone), exhibiting head-tossing, pouting and, at one point, holding Todrick's own head.
“Last night was EPIC! Thank you @taylorswift for being the sweetest human on earth! Such a freakin blast!” Todrick captioned the video.