N.E.R.D (a.k.a. Pharrell Williams, Chad Hugo, and Shay Haley) made a triumphant return yesterday with the Rihanna-assisted “Lemon,” but the song may not be new, exactly. There’s a lot of evidence that “Lemon” was fully or partially recorded back in 2015, starting with social media posts from Rihanna and Pharrell themselves.

On January 3, 2015, Rihanna shared a bikini photo on Instagram accompanied by the caption, “Tell da paparazzi get the lens right.” Just over a month later, Pharrell shared his own Instagram post with almost the same caption: “Tell tha paparazzi get tha lens right.”

As it turns out, this is a line from the song’s chorus, where Rihanna and Pharrell sing:

Nigga the Veyron glide

Tell the paparazzi get the lens right

Rihanna and Pharrell’s 2015 Instagram posts came within a month of N.E.R.D releasing a trio of songs for the soundtrack to The Spongebob Movie: Sponge Out of Water. The songs were the group’s first new music since its 2010 album Nothing. Just a few months later, Pharrell confirmed that N.E.R.D was planning to make a new album.

There are also some a reference to 2015 pop culture on the track. The song’s interlude also features a sample of a 2015 viral video, which BigBabyGOAT-116 further explains below:

If “Lemon” was recorded and teased in 2015, it’s not clear why they ended up shelving the song (and potential project) until now. Whatever the reason, the song is finally out and ready to become a late-2017 jam.

Listen to the full song above and read all the lyrics to N.E.R.D’s “Lemon” featuring Rihanna on Genius now.