You tell me!
Say if I wanted to say "I don't know, you tell me!" would this be, No sé. ¡Dímelo tú! I think it sounds right what do you think?
3 Answers
You can say: Dime tú o Dímelo tú or even Di tú. You can also use the future to convey the same meaning:
Tú me dirás. In this case, tú goes first. And it's idiomatic, so there's no sense trying to figure it out.
Everyone saying you don't need tú is wrong.
It's the difference between "tell me" and "YOU tell me". Seems obvious.
I don't think you need the tú at the end.