For three years he was part of the Romanian group Millenium 3[6] and was noted by Gyuri Pascu as a potential star.

[10] Radio Killer is made up of seven members: The group released the single "Be Free" in 2010 on Blanco Y Negro label, the international release "Lonely Heart" on various labels in Romania, France, Spain, Italy, Netherlands and Sweden in 2011 and "Don't Let The Music End" on EMI in 2012.

[14] The comedy inspired by the group Simplu and Smiley's career, is about the difficult choices Smiley had to make: his bandmates and friends or international fame as he is confronted by an American talent scout who is offering him a lucrative deal provided he quits his band, Simplu.

He was also invited as a presiding judge in Vocea României, the Romanian version of the international music competition franchise The Voice.

[19][20] Ştefan Stan released his debut album Povestea mea with Smiley's production HaHaHa productions; releasing "You Give Me Love" written by his coach Smiley[21] before signing a deal with Universal Music Romania.