Selena Gomez Back with Justin Bieber ... Again?

2/3/2013 12:10 PM PST

Justin Bieber, Selena Gomez Back Together ... Again?

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Time to fire up the Justin Bieber/Selena Gomez rumor mill ... because Selena was spotted returning home yesterday after hanging out allllll night with the Biebs.

The on-again/off-again (to the infinity power) couple hasn't actually been seen together in some time ... and we're told this is the first time the two have seen each other in a month.

It's clear these two young lovebirds just don't know how to quit each other.
"Brokeback Mountain" jokes ... 'memba those?