Four For Friday

This is actually three rather than four. It happens.

These two singers are B list although one of them probably has close to A list name recognition. Both male. Anyway, it turns out that when they worked on a project together they ended up falling for each other. So far, it is being covered up for the sake of one of them who is involved with a woman.

#1&2 - singers
#3 - project they worked on together.