[4] In 2010, Beltė competed in Vaikų Eurovizijos nacionalinė atranka, the Lithuanian preselection for the Junior Eurovision Song Contest 2010.

[5][6] In 2017, after being encouraged by his sister to apply, Beltė competed and later won the Lithuanian reality competition television show Aš – superhitas (I Am a Superhit).

[4] Upon winning, he moved from his hometown to Vilnius, where he later released his debut single, "Noise".

[9] The following year, he competed in the sixth season of X Faktorius, the Lithuanian version of The X Factor, where he was eliminated in the fourth week.

[13][14][15][16] On 29 March 2024, several entrants, including Silvester Belt, released a joint statement calling for "an immediate and lasting ceasefire" in Gaza, as well as "the safe return of all hostages".