Apparently "When I was your man" by Bruno Mars is Liam's favorite song and he even dedicated it to Miley, this song was a source of inspiration to compose flower, being a response, And he even dedicated it to Miley the Day they got married
Bruno Mars : That I should have bought you flowers Miley Cyrus : I can buy myself flowers Bruno Mars: And held your hand Miley Cyrus: And I can hold my own hand Bruno Mars: And I can hold my own hand Miley Cyrus: