Described as a production by two of the most powerful music artists in the Philippines, the concert was Velasquez and Geronimo's first joint venture, although they have appeared as guest acts for each other's shows in the past.

In March 2002, Regine Velasquez presented the first season of the television singing contest Star for a Night, which was based on the British talent show of the same name.

[8][9] On screen, they have co-starred in the superhero film Captain Barbell (2003), and Velasquez made a cameo appearance in Geronimo's family drama Unforgettable (2019).

In partnership with the television station, one of her first projects under the deal was hosting the musical variety show ASAP Natin' To, of which Geronimo is part of the ensemble performers.

[11][12] On December 9, 2019, Viva Live announced through their social media accounts that the pair would be partaking in a co-headlining concert on February 14–15, 2020, at the Araneta Coliseum in Quezon City, with a show title called Unified.

[16] The concert's behind the scenes special depicted the pair rehearsing with the band, the lead up to the event, and clips of fans waiting in line to show appreciation for the singers.

[17]: 26:50  The set list featured songs taken from the pair's catalog spanning the majority of their careers, and included covers of pop and OPM music.

Sushila Reyes, the vocal director, described the show as a musical treat, "It's a rare chance that you get to hear the best of their hits together, re-interpreted [and] re-invented".

[17]: 29:50 Velasquez and Geronimo worked with multiple local designers for the shows' costumes, including Mak Tumang, Michael Leyva, Leo Almodal, Rajo Laurel, Neric Beltran, Edwin Tan, Jot Losa, and Nat Manilag.

[18] The pair wore blue embellished ensembles designed by Tumang and Leyva for the opening, while they donned sheer white crystal-encrusted gowns for the finale.

She was then joined by Geronimo and spoke briefly about the "divas of their respective generations", before transitioning into an Adele and Whitney Houston tribute number.

"[19] Ryan Arcadio from the Philippine Daily Inquirer commended Geronimo's performance of "Tala" for its "fierce" routine, highlighting its revamped choreography.