The element of surprise is one of the many things that make Bizarrap‘s music and freestyle sessions some of the most watched videos on YouTube. Who will his next guest be? No one really knows, but when the Argentine producer drops a new session, it gets millions of views in a matter of hours.

His music session with the Spaniard Quevedo is among his most watched, and it’s the one that has catapulted him to global success. Their “BZRP Music Sessions #52” scored both their first entry on the Billboard Hot 100. Currently, it has more than 400 million views on YouTube. Additionally, the track is only the second fully Spanish-language song to top the Global 200 in the chart’s two-year history, following Bad Bunny and Jhay Cortez’s “Dákiti” in 2020.

“The first ‘session’ back in 2018 wasn’t even planned,” Biza previously told Billboard. “All I wanted to do was record a local rapper who goes by Kodigo and upload that to YouTube because I was a big fan of his and I wanted others to listen to him too. My plan was to record with my phone, but for some reason it didn’t work. So we scheduled the session for the following day and I thought, ‘Why not give these freestylers the production they deserve with microphones and everything?’ So that’s what I did.”

Since then, he’s recorded freestyle and/or music sessions with Nicki Nicole, Nicky Jam, Nathy Peluso, Cazzu, Residente, Peso Pluma and Shakira. With the Colombian artist, he teamed up for “BZRP Music Sessions #53,” released January 2023, where the Colombian star doesn’t hold back and is as blunt as ever about her ex, Spanish soccer star Gerard Piqué. The dis track won song of the year at the Latin Grammys. His latest session is a two-song project with corridos tumbados pioneer, Natanael Cano, which dropped April 3. The “BZRP Music Session #59” is comprised of chapter one, titled “Endiamantado,” and chapter two, which is powered by the song “Entre Las de 20.” 

Below, Billboard ranks 10 of Bizarrap’s best sessions: