“That’s What Love Is” Is The Fifteenth Song On Justin Bieber’s Fifth Studio Album "Changes". On The Track Bieber Sings With A Backing Guitar Instrumental About How Much He Admires The “greatness” That Comes With Being In A Relationship And How He Has Learned From Being In Love. In A Pitchfork Review Of "Changes" Jayson Greene Called This Song A Highlight Of The Album “That’s What Love Is” Features Nothing But An Acoustic Guitar Capo’d High And Twinkling Like A Music Box. The Words Redefine “sweet Nothings” “Don’t Nobody Else Deserve My Eyes ” He Avows But They Dissolve In The Sunlight Of Bieber’s Falsetto. The Way He Capers Between Chest And Head Voice Is Effortless And Dazzling Like Watching A Figure Skater Land Triple Lutzes One After The Other. For Exactly Two Minutes And Forty-Five Seconds The Joy He Takes In His Talent Is Palpable.