Chris Brown is BACK on Twitter…Countdown to Next Meltdown in 3…2…1…

Chris Brown’s back on Twitter and tweeting about — you guessed it —Rihanna.

Less than a week after leaving Twitter following a profanity-laced spat with comedian Jenny Johnson, Brown revived his account Sunday, posting a black and white Instagram pic of himself with a cigarette and Rihanna lounging in the background in her skivvies and a camouflage blanket. He offered this caption: “What would music today sound like if these kids didn’t exist?”

This morning, the tweet and photo were no longer on Brown’s Twitter timeline.