What even is going on with Justin Bieber and Selena Gomez? First, on Sunday, Justin posted a #tbt photo on Instagram of him and Selena kissing, and then on March 23, she went to his Staples Center concert in L.A.

Bieber posting throwback pictures of Selena is nothing new, but what makes this different is that this time she responded (thank you, rabid Internet stalker fans).