About Jonas Berggren
Jonas Petter Berggren is a Swedish musician, singer-songwriter, and record producer, also known as Joker. He started writing songs when he was seven and continues to write for the band Ace of Base, a group he formed with his two sisters Linn and Jenny. Berggren has written most of their hit songs including "All That She Wants", "The Sign", and "Beautiful Life". As well as singing, he also plays the guitar and keyboards. Jonas was named after his great-great grandfather, who was a corporal. He is the older brother to Linn and Jenny Berggren, who he formed Ace of Base with.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.