R&B Singer Tinashe Did The 'BIG CHOP' . . . She Cut Off ALL HER HAIR . . . And People Are Saying She Now Looks Like A WET RAT!! (TRAGIC PICS)

R&B singer Tinashe decided to do the BIG CHOP - and cut off all her hair. People on social media are being VERY HARSH in their review of Tinashe's new style.

Here's what she used to look like:

And here's what she looks like now: