He is known for being in a love team with Michelle Liggayu, who was his fiancee in real life with the two collectively known as JaMich.

[2][3] Jam Sebastian was born at 7:37 PM on Thursday, 20 March 1986 at the Chinese General Hospital and Medical Center and was the second son of Vilmo Flores Sebastian (born 28 August 1961, Santa Cruz, Manila)[4] and Maria Carmen "Maricar" G.

[5] Before JaMich, Sebastian had described his relationship with Paolinne Michelle Liggayu as puppy love.

[6] Sebastian had also confirmed during an interview with StarStudio Magazine that they aka "JaMich" have been a couple since 2008.

By Chance was their first uploaded video which gained more than seven million views with 543,163 accumulated subscribers.