Lady Gaga will serve as the host and musical guest of 'Saturday Night Live' this weekend (Nov. 16) and she's knee-deep in rehearsals. The promos are out and Ma Monster demonstrated an easy, goofy chemistry with cast member Kenan Thompson, with whom she gets sick.

In their first skit, Thompson said he got all dressed up in honor of her appearance, wearing his meat watch, which he then proceeded to nosh on. Gaga looked super glam in her black gown and short, blunt bob.

In a later spot, Thompson can't tell the difference between Gaga and a lamp with a wig.

They also faux vomit after they flip things upside down. They run in place and then the flipping screen almost made us throw up too! Performing and puking -- it's all in a day's work for Ma Monster.

We're excited to see how she does as an 'SNL' host, since viewers will have to suspend disbelief and not think "This is Lady Gaga playing a character" while watching every skit.

PopCrushers and little monsters, will you be tuning in for Gaga's maiden voyage as 'SNL' host this weekend?