Sam Tsui—a member of the popular College Musical YouTube series—made waves in July with his epic, must-be-seen-to-be-believed Michael Jackson medley. Now, Tsui takes on the Deity of Fierce herself, Lady Gaga—and it rocks.

Watch as Tsui—accompanied by friend Kurt Schneider on guitar—brilliantly runs through an original composition of some of Gaga's greatest hits, including Bad Romance, Just Dance, Love Game, Poker Face and Paparazzi.

And for good measure, here's the aforementioned medley of Tsui performing some of Jackson's greatest hits. This video is particularly impressive, as Tsui recorded each individual part and then edited it all together, thereby making it appear as though there were six of him performing simultaneously.

If you liked these videos, be sure to check out Tsui and gang's YouTube channel for even more—including Mariah Carey and Beyoncé.

[Via YouTube]