Sophia Grace
Inspired by her two favorite British girls, Ellen and her co-hosts recreated the moment Sophia Grace and Rosie met their idol, Nicki Minaj.
Dr. Phil
Taking a break from her own show, Ellen decided to take a leap into the world of psychology and familial disputes.
Sabrina DeGeneres
Meet Ellen's evil twin, Sabrina. We still don't know who's the better dancer.
Scarlett O'Hara
Ellen was Gone With the Wind in this petticoat dress inspired by Vivien Leigh's iconic character.
Cowboy and Horse
When in doubt, buy an inflatable costume.
Pregnant J.Lo
Back before Jennifer Lopez gave birth to her twins, Ellen happy to imitate the pregnant singer, huge bump included.
Snooki's Hair
Remember when the Snooki pouf was all the rage? Well, now you'll never forget.
The Change America Needs
Ellen for Change—loose change, that is.
O Magazine
Sometimes Oprah Winfrey does share the cover of O.
Amal & George Clooney
George would be first to say that Amal is the brains of this operation.
Sofia Vergara
Ellen made the real deal laugh about her wardrobe malfunction at the 2012 Emmys.
Glinda the Good Witch
Sure, this outfit was for the 2014 Oscars. But as far as memorable costumes go, it's right up there.
Sia
Wig firmly in place, Ellen was joined by Heidi Klum, who had the moves as Sia's dance muse Maddie Zeigler.
Nicki Minaj
Ellen rocked these leather pants.
Karla Kardashian
Joined here by Ariana Grande, Ellen introduced the newest member of the Kardashian family with a bold-patterned top and some major cleavage.
NEXT GALLERY: Today Show Hosts' Halloween Costumes Through the Years