Jordin Sparks -- Swanky New Jeep ... Cures Break-Up Blues

Jordin Sparks sent a clear message to her ex, Jason Derulo -- take your Beemer and shove it ... 'cause I just bought my OWN new wheels. new 4X4 to help get over the rocky split.

Last Christmas -- when they were still banging -- Derulo santa'd up and gave Sparks a flashy BMW ... complete with bows. But Jordin just went out and scooped up a Jeep Rubicon Unlimited for her 25th b-day.

And just to make sure everyone got the diss -- she also deleted Derulo's gift her from Instagram. She's said in interviews she would give it back.

The only remaining question: what does she do with all those big ass bows?