Our friends at ClevverTV spilled the Glee, season 4 premiere episode songs — including a mash-up of Justin Bieber’s “Boyfriend” and Britney Spears’ “Boys!” — but what was missing was actual footage of the performances. Fortunately, thanks to the kind folks over at FOX, you can see one of them rightthissecond. It involves Rachel (Lea Michele), new dance teacher Cassandra (Kate Hudson) and two very familiar names, Lady Gaga and Jennifer Lopez. (Yes, it is as good as it sounds.) Watch Kate perform “Americano”/”Dance Again” above, and make sure to watch the Glee premiere this Thursday, September 13 at 9pm EST!