Last year, the two went back and forth with pranks. In April, Ellen had Lauer's head photoshopped onto the body of a naked man shaving on a couch after Lauer filled her car with 20,000 ping-pong balls.
In Ellen's latest joke at Lauer's expense, she had his Adele interview recut to make it seem as if he got a little too handsy with the British singer.
"I guess the war is back on," Today show anchor Carson Daly said after playing the clip from Tuesday's episode of The Ellen DeGeneres Show. "What are you going to do now?"