Sepertiyang dimuat dalam laman ETOnline, Kamis (12/3/2015), keluarga Gaye menduga lagu Pharrell Wiliams berjudul Happy merupakan lagu plagiat dari lagu Gaye lainnya, yang berjudul Ain't That Peculiar. Dalam kesempatan yang sama, keluarga Gaye mengatakan bahwa Pharrell sangat mengidolakan Gaye.
Lirik lagu Happy - Pharrell WilliamsIt might seem crazy what I am 'bout to saySunshine, she's here, you can take a breakI'm a hot air balloon that could go to spaceWith the air, like I don't care, baby by the wayHuh Because I'm happyClap along if you feel like a room without a roofBecause I'm happyClap along if you feel like happiness is the truthBecause I'm happyClap along if you know what happiness is to youBecause I'm happyClap along if you feel like that's what you wanna doHere come bad news talking this and that YeahWell give me all you got, don't hold back YeahWell I should probably warn you I'll be just fine YeahNo offense to you don't waste your timeHere's whyClap along if you feel like a room without a roofBecause I'm happyClap along if you feel like happiness is the truthBecause I'm happyClap along if you know what happiness is to youBecause I'm happyClap along if you feel like that's what you wanna do Uh, bring me downCan't nothing, bring me downMy level's too high to bring me downCan't nothing, bring me down, I saidBring me down, can't nothingBring me downMy level's too high to bring me downCan't nothing, bring me down, I saidClap along if you feel like a room without a roofBecause I'm happyClap along if you feel like happiness is the truthBecause I'm happyClap along if you know what happiness is to youBecause I'm happyClap along if you feel like that's what you wanna doClap along if you feel like a room without a roofBecause I'm happyClap along if you feel like happiness is the truthBecause I'm happyClap along if you know what happiness is to youBecause I'm happyClap along if you feel like that's what you wanna doUh, bring me down Happy, happy, happy, happyCan't nothing Happy, happy, happy, happyBring me down, my level's too highTo bring me down Happy, happy, happy, happyCan't nothing Happy, happy, happy, happyBring me down, I said .