A source told the tabloid,
“They’re often quite flirty and Sam went to Adam’s sold out concert in New York last week after he went to one of Sam’s concerts in the UK.”
They also went clubbing in New York City recently.
Mirror Celeb (@MirrorCeleb) March 07, 2016
They’ve also talked about doing a duet but it hasn’t happened yet. Maybe that’s why they’ve been spending so much time together? Maybe they’re each other’s wing men? Or maybe they’re set to be the next celebrity power couple?