EXCLUSIVE

Michaele Salahi is going to be a married woman again -- her Journey rocker BF Neal Schon popped the question tonight ... and she said yes. 

We're told the band was playing a benefit tonight for the Johns Hopkins Kimmel Cancer Center when Schon called her up on stage and popped the question ... with a massive 11.4 carat ring.

According to our sources, Salahi broke down in tears and jumped up and down as the band played their song "Faithful." We're told the proposal was a complete surprise to Salahi.

Salahi became officially divorced from hubby Tareq back in August.