Question about "Impossible" Challenges

[Jaywalker21]

Hey all,

I was just wondering if I had to unlock the impossible challenges to beat them. What I mean is, what if I play online with a friend who has already unlocked the Impossible Vocals Challenge, and he selects it, and I sing while he plays a random instrument? Will I get the achievement that way? Or do I have to unlock it myself and be the one who actually selects it in online band mode? Any helpful insight on this will be appreciated.

Thanks in advance!

[shin-akuma]

The achievement unlocks for beating the challenge. It doesn't matter if you unlock it yourself as long as you complete the impossible challenge. It also doesn't matter if you play the instrument yourself, your friend can play the required instrument and you'll still get the achievement.

[Silly Lil Panda]

you dont need to unlock it jus beat the impossible you can also do the impossible challenges on any difficulty