"It's just the gift that keeps on giving," the singer-songwriter said of her hit song on 'The Nikki & Brie Show' Christina Perri approves of Twilight fans using her hit track as their wedding song.

Christina Perri is celebrating seven years of sobriety ... Perri threw herself into music and developed a lullaby collection called Songs for Carmella: Lullabies & Sing-a-Longs for her daughter.