John Legend, Chrissy Teigen and the entire fam bam were all smiles on Thursday, and for good reason — they celebrated their daughter Luna's birthday at The Happiest Place on Earth!The GRAMMY-winning singer and his model wife rolled up to Disneyland with Luna, who turned 6, and their 3-year-old son, Miles. The «Green Light» singer donned a colorful flower button-up, Teigen threw on some Minnie Mouse ears over her head while Miles opted for a tie-dye hoodie.