Grammys Adele and Lady Gaga Hang Out Backstage at the GRAMMYs -- See the Adorable Instagram! By John Boone 9:50 PM PST, February 12, 2017 Now Playing hh:mm:ss What's the exact opposite of performing with Metallica? Probably this.Lady Gaga and Adele hung out together backstage at the GRAMMYs on Sunday, sometime after Gaga's glitchy heavy metal debut and sometime between Adele sweeping every category she was nominated in and performing two and a half times and making Beyoncé cry. View this post on InstagramThis one 👸❤🤘killin it tonight like girls doA post shared by Lady Gaga (@ladygaga) on Feb 12, 2017 at 8:10pm PST"This one," Gaga captioned the photo. "killin it tonight like girls do" WATCH: Adele Drops F-Bomb After Briefly Stopping George Michael Tribute, Still Delivers Powerful PerformanceThis isn't two divas passing in the night -- Gaga and Adele have been friends for a while, even sparking pre-25 and pre-Joanne rumors that the two were collaborating on music together after Gaga shared a selfie from their "bro-down." View this post on Instagram🌹Nothing like a Wednesday night bro-down with the beautiful Adele.A post shared by Lady Gaga (@ladygaga) on Jan 22, 2015 at 12:51am PSTAdele also recently gushed about Gaga's Super Bowl halftime show, Instagramming a shot of TV screen and writing, "Lady you SMASHED it! Totally nailed it" View this post on InstagramLady you SMASHED it! Totally nailed it 👌🏻A post shared by Adele (@adele) on Feb 6, 2017 at 11:52am PSTNow, back to those collaboration rumors. Can we get something on the books for 2017?EXCLUSIVE: Watch Celine Dion and Lady Gaga Adorably Fan Out Over Each Other on GRAMMYs Red Carpet Related Gallery2017 GRAMMY Winners – See the Stars With Their Awards!