Iggy Azalea is celebrating one year with her “favorite person” — her son Onyx! To celebrate her child’s first birthday, the 30-year-old rapper shared an adorable carousel of photos starring the birthday boy on April 27. “Happy 1st Birthday to my favorite person in the entire universe!,” Iggy gushed in the caption, adding, “I never thought I could love anything or anyone this much, Onyx you’re a joy. Your happiness is my happiness.”