Adele just made a huge announcement at her concert over in Germany ...

confirming her engagement to Rich Paul . The singer was doing her thing onstage in Munich when she told the crowd at her Friday concert she's getting married to Rich ..

. flashing her massive engagement ring in the process. pic.

twitter.com/L854MF5rea Check out the video from the concert ..

. Adele is telling a story about how she told someone, "I can't marry you because I'm already getting married" ..

. and the crowd goes nuts as soon as Adele finishes the sentence -- and shows off the 4-carat diamond ring on THAT finger. The engagement ring looks like the one Adele's been wearing for a while .

.. a piece of jewelry that sparked rumors that Rich had finally popped the question .

Now, Adele's confirming recent reports that Rich proposed last month in London ...

though it's unclear when they're planning to walk down the aisle. Adele's been calling herself Rich's wife for a few months now ..

. it's more of an unofficial title, but seems they're getting to work on making it official. She's also mentioned wanting to start a family together.

Mazel Tov!!!.