Justin Timberlake hosted "SNL" last night and Lady Gaga was the musical guest, and although we didn't get an encore of "Dick in a Box" — too easy, I suppose — the duo and Andy Samberg did team up for an SNL Digital Short called "3-Way (the Golden Rule)." The concept? It's not "gay" if it's in a three-way. Watch the funny music video (with cameos from Susan Sarandon and Patricia Clarkson) after the jump.