Katy Perry was the musical guest on Saturday Night Live (SNL) last night (May 20). This was Perry's third appearance on the show. 

She kicked off the season finale with 'Swish Swish.' This is the first single from her upcoming album, 'Witness', was released on Friday (May 19) and features rapper Nicki Minaj. 

Her second song, 'Bon Appétit,' was performed with the singer laying on a Babette's Feast-style dinner table, spread out and surrounded by vegetables and fruit.

SNL also featured Alec Baldwin as Donald Trump singing the late Leonard Cohen's 'Hallelujah' with Scarlett Johansson playing the part of Ivanka Trump.