Saturday Night Live, Lady Gaga, Justin TimberlakeThis weekend, Justin Timberlake and Lady Gaga will team up for the most epic 'Saturday Night Live' season finale in recent history.

Timberlake is no stranger to the 30 Rock studio, having racked up 11 previous host/guest/cameo appearances over the past 11 years. Gaga's also an 'SNL' vet who made her debut in 2009 alongside Ryan Reynolds.

Watch the two superstars team up to tease Saturday's show in NBC's latest promo.