Karol G and Romeo Santos unveiled their new song "X si volvemos" on Instagram, after more than a few of their fans speculated a collaboration. 

"X si volvemos" was composed by Karol G and Santos along with Kevyn Mauricio Cruz. It was produced by Ovy On The Drums, a producer who has worked with La Bichota on several occasions.

Only two hours after its premiere on YouTube, the song already has more than 670,000 views, and is approaching 200,000 likes. Now, it has more than 3 million plays, placing it at number two in Music on the platform — it was number one at one point. 

"Uniting both artists for the first time, the song tells the passionate and sensual story of the end of a relationship," Universal said in a release statement about the song. 

The song will be part of Karol G's new album Mañana será bonito, which was announced by the artist a week ago along with a teaser video. 

A photo controversy

For the official announcement, Karol G published several photos in which she was seen posing in a white blouse and lingerie. The sensual nature of the photos aroused some negative comments about her body. 

Karol G responded to the messages by defending herself, proud of her body.

"Never let comments like these distort the beautiful way you look. All bodies are different, everyone is beautiful just the way they are. How cool diversity and beyond, how nice it is to see the real and not the ephemeral. The pictures were not taken by my worst enemy, they were taken by one of the best photographers I've ever met and I still can't believe we took pictures together. It's not about whether or not my body is flattering because it's my body and it's real," she wrote.