'Masked Singer' Wild Card Performer Has Rolodex of Famous Friends

The wild card for Wednesday night's 'Masked Singer' was able to put together a whole performance in just one day, in part because they've got a phone filled with some music biz heavy hitters.

The singer will appear as Pepper when they hit the stage, but came on "TMZ Live" sans the big red costume -- but still concealing their identity -- to tell us the crazy story of how they ended up on the show.

After another contestant had to drop out, producers dialed up our hot-headed friend here ... giving them very little time to get their act together. Pepper says it set off a whirlwind 24 hours filled with learning dance moves, trying on costumes and the big hurdle of getting clearance to sing famous songs.

Pep definitely made it seem like that last part -- getting the songs -- was easiest, because turns out they happen to know a bunch of big-time performers ... maybe even Bob Dylan, based on a little quip they dropped with us.

Look, we couldn't figure it out, but there were plenty of hints -- so, see if you can figure it out. Either way, Pepper will make its big debut on "The Masked Singer" tonight.