Yesterday evening brought with it the debut episode of ‘The Tonight Show With Jimmy Fallon’.

Hyped in earnest, it marked the comedian’s first turn in the iconic chair – which was left vacant by departed host Jay Leno.

To help the funny-man make a major first impression, a multitude of megastars (and Kim Kardashian) stopped by for a hilarious surprise skit.

Included in the line-up were divas Mariah Carey and Lady GaGa, who both earned rapturous applause from the studio audience.

Watch below…

Hilarious!

GaGa fans can catch the singer on The Tonight Show again this evening, when she takes to the stage to perform.

Your thoughts?