Jam Vhille Sebastian (20 March 1986 – 4 March 2015), better known as Jam Sebastian, was a Filipino celebrity and one half of real-life couple together with her fiance called JaMich, who studied at St. Mark's Institute Casimiro Village in Las Piñas City, who gained popularity in the Philippines on YouTube. Paolinne Michelle Liggayu, better known as Mich, was Sebastian's ex-fiancee.