Their official trio lineup in 1999 consisted of Bălan, Radu Sîrbu, and Arsenie Todiraș.

[3] The group gained global popularity with their song "Dragostea din Tei" and their subsequent album DiscO-Zone, which was released in 2003,[4] before disbanding the following year.

In 2024, it was announced that O-Zone are going to do a summer tour, but this time as a tribute band, consisting of Arsenie as only singer and two dancers.

At one such audition, he met Arsenie "Arsenium" Todiraș, who eventually won over the initially skeptical Bălan with his version of Elvis Presley's "Love Me Tender".

Their second hit, which brought them worldwide attention, was "Dragostea Din Tei", translated roughly as "Love from the Linden Trees".

[7] However, the song gained popularity in Italy when the little-known duo Haiducii released a cover of "Dragostea Din Tei", which topped the Italian pop charts.

[18] On 5 May 2017, Dan Bălan, Radu Sîrbu and Arsenie Todiraş announced that O-Zone would be reforming for two concerts.

[19] On 17 December 2019, Dan Bălan, Radu Sîrbu and Arsenie Todiraş announced that O-Zone would be performing for one concert, which took place on New Year's Eve 2019 in Bucharest as part of performances by stars of the 90s and 00s called Revelion 2020 Disco Night Fever.

In 2024, O-Zone announced a summer tour in Europe, but this time as a tribute band, consisting of Arsenie from the original group and two dancers.