Is it too late to train your voice when youre a male in your early 20s, with a natural medium to low tone?

it's definitely not late to start. but be ready to 'unlearn' all the faulty singing habits you acquired all these time. through voice training you will be able to reach higher notes than your usual range, but definitely not transform your voice from the round and cool voice that you have to a high-pitched singer like timberlake. to sing like justin, you will need to have a naturally small and high-pitched voice. frankly, i don't dig the man, sorry, he is not the best role model in singing. get a better idol.

uhmm no not in your early 20's... try like lip drills like going woooOOOO you know like from loww to higgh.... hard to explain on the computer but maybe use the piano or keyboard and go from lowest to highest, matching the pitch to excersise your voice. then just practice singing songs that are higher for men. just keep trying and good luckk!