Frequent target of celebrity pranks Jimmy Kimmel lived out millions of teen dreams when Britney Spears snuck into his bedroom to perform a very private, very unexpected late night concert. Spears – a team of go-go dancers and an arsenal of disco lights in tow – gave Kimmel a wake up call he’ll never forget, lip-syncing a song from her forthcoming album at the foot of the late night host’s bed. Check out the clip above, which ends with a genuinely horrified Spears realizing Kimmel’s kids might stumble on the scene.