Jimmy Kimmel enlisted the help of '90s R&B stars Boyz II Men to give Oprah Winfrey a hilarious musical goodbye on his show last night. Oprah is signing off after 25 years on the air, and Jimmy and the singers recalled some of her biggest moments by putting a comical spin on the Boyz II Men track "It's So Hard to Say Goodbye." Today's very last Oprah episode follows a two-part Oprah special that featured some of today's biggest stars, from Tom Cruise to Beyoncé Knowles. The talk-show host didn't welcome any new guests on her closing episode today, but she had lots of famous friends in the audience as she shared an emotional goodbye and even gave her personal email to her fans, asking them to stay in touch. Check out Jimmy's video tribute to the iconic TV personality!