Top 10 Singers and Guitarists Who Should Make a Song Together But Didn't

The Top Ten
1 Freddie Mercury + Slash
2 Dave Mustaine + Kirk Hammett David Scott "Dave" Mustaine (born September 13, 1961) is an American musician, singer, songwriter, actor and author. Mustaine is best known as a pioneer in Thrash Metal, being the former lead guitarist of Metallica before his dismissal in 1983, leading to finding and becoming the front man of his own band Megadeth shortly after.

There's still time. A lot of the people on this list still have the opportunity to do something before it's too late.

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]

3 James Hetfield + Marty Friedman
4 Bruce Dickinson + Zakk Wylde
5 Robert Plant + Brian May
6 Jimmy Page + Ian Gillan
7 Lemmy + Jeff Hanneman
8 Tom Araya + Randy Roades
9 Chuck Billy + Tony Iommi
10 Roger Daltrey + Keith Richards
The Contenders
11 Hayley Williams + Evan Taubenfeld
12 Avril Lavigne + Josh Farro
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