Australian singer Guy Sebastian has welcomed a second son. The 32 year old and his wife Jules are now parents to Archer Jones Sebastian, who was born on Thursday (16Apr14). Sebastian shared a snap of the newborn on Instagram.com, and tweeted, "We are stoked (excited) to welcome little Archer Jones Sebastian into the world. He's a little cutie." The pair already has a son, Hudson, who was born in March, 2012.