Top 10 Singers and Guitarists Who Should Make a Song Together But Didn't
The Top Ten
There's still time. A lot of the people on this list still have the opportunity to do something before it's too late. - Gg2000
They actually did something like that (live) - they even hugged each other. It was in 2010 at the legendary Big 4 concert in Sofia, Bulgaria (metal fans have heard of this live event).
Title of the video on youtube:
Metallica: Am I Evil? (Live w/ The Big 4) [The Big 4: Live in Sofia, Bulgaria] - Metal_Treasure