Katy Perry starred as the host of Saturday Night Live over the weekend, December 10, and did a fantastic impersonation of Florence Welch. 

The 'Teenage Dream' superstar donned a long red wig and floaty long-sleeved dress for the skit, which saw her mimic the Florence and the Machine frontwoman perfectly, and performed a parody of 'Dog Days Are Over' - renaming the song 'Dog Trial Is Over'. 

Her presence on the popular U.S. show also saw Andy Samberg dress as Perry's nerdy alter-ego Kathy Beth Terry and 'Bridesmaids' actress Kristen Wiig appeared in the well-known 'California Gurls' costume. 

Watch the Florence and the Machine skit in full, along with another part of her entertaining appearance, below: