WATCH: Mick Jagger, Kristen Wiig sendoff highlight ‘SNL’ season finale

NBCMick Jagger and Kristen Wiig shared the spotlight on “Saturday Night Live.” “Saturday Night Live” bid a poignant, emotional farewell to its 37th season, sending off cast member Kristen Wiig with a sing-along led by the weekend’s host, Rolling Stones front man Mick Jagger. Wiig started crying during the…