Long gone are the tense "Ask Taylor" days, when Demi Lovato and Selena Gomez had obviously grown apart and out of each other's lives: Demi just posted a selfie of the two on Instagram.

She captioned the photo with, "Look at how #coolforthesummer we are.. Friends for years, #sameoldlove [friend emojis]," referencing both Demi's and Selena's latest songs.

Selena and Demi first met on the set of Barney and Friends back when they were tiny. From there, they clung to each other like lint to a dryer filter, until they eventually drifted apart. People grow up, they grow apart, life gets in the way, Demi went to rehab, Taylor Swift stole Selena from her, whatever. Neither party has addressed the dissolution of their friendship, but the media latched onto any mention of the two together — kind of like what we're doing right now.

But then a breakthrough took place earlier this summer: Demi followed Selena on Instagram a few weeks ago, Selena wished Demi a happy birthday a few days later and Demi responded to that tweet publicly. So everything's back to normal, with the two of them promoting each other's singles and using BFF hashtags like #forever and #nomatterwhat on social media.

Have you ever rekindled an old friendship? Has a celebrity ever stolen one of your best friends? How cute are Demi and Selena? Share your thoughts on the reunion.