Rihanna and Chris Brown are back on ... BIG TIME!

The on-again-off-again-on-again couple attended the Lakers/Knicks game together and left hand in hand.

RiRi and Brown haven't been seen together like this since the R&B singer assaulted the "Umbrella" songstress back in 2009.

Brown has reportedly dumped Karrueche Tran in favor of Rihanna.

Check out the photo RiRi posted on Twitter with the caption: "Thug Life #merryChristmas.”

This love story never seems to end!