Shawn Mendes had a very special treat up his sleeve for fans at his O2 Arena show in London on Saturday night (Aug. 16). The ...

If the whole world were watching, Niall Horan and Shawn Mendes would still make surprise appearances at each other's concerts ...

Shawn Mendes brought out Niall Horan at his show in London for a surprise duet of "This Town." "I'll remember this for a long time," the "Mercy" performer told fans.

Shawn Mendes invited former One Direction singer Niall Horan to join him for a surprise duet of Horan's debut solo single ...

"This town is a ghost now / Feel like I used to know this city," he sings. "Now I can't even go out / In every corner, there's a memory." ...