David Spade Says He Has No Idea How He Gained 25 Pounds of 'Mystery Weight' - Watch!

David Spade is opening up about his mystery weight!

The comedian made his 25th appearance on The Ellen DeGeneres Show on Monday (October 29).

PHOTOS: Check out the latest pics of David Spade

During his appearance, David spoke about his new audiobook, A Polaroid Guy in a Snapchat World. He also joked that he’s trying to achieve the highly coveted EGOT title, but so far, he only has one Emmy nomination.

Plus, David shared a hilarious story of how he discovered he gained 25 pounds of mystery weight.

Watch him explain below!