The Flash - Season 4, Episode 13: Soundtracks

Marlize sings to herself inside her head to keep Clifford from listening to her thoughts, he calls her out on such action but she tells him she's thinking of the first time they met; (repeats)

Ralph disguised as Wolfe is taken to meet Amunet at a local gym where she watches her goons box.

Clifford sings to Marlize after drugging her with the Weeper's tears then pulls her into his embrace and dances with her.

Marlize sings to herself inside of her head to keep Clifford from listening into her thoughts; (repeats); Clifford sings to Marize after dosing her with the Weepers tears and pulls her into a dance.