#	Title	Length	Track artist	Release title	Release artist	Release group type	Country/Date	Label	Catalog#
Official
1.1	Happy	3:41	TAEYEON	Happy	TAEYEON	Single	DZ2020-05-04 AD2020-05-04 (show 76 more) VN2020-05-04	SM Entertainment
1.1	Happy	3:41	TAEYEON	Happy	TAEYEON	Single	AF2020-05-04 AL2020-05-04 (show 214 more) ZW2020-05-04	SM Entertainment
1.6	Happy	3:41	TAEYEON	What Do I Call You (My Only ver.)	TAEYEON	EP	XW2020-12-15 KR2020-12-15	SM Entertainment	7989878, SMK1214
1.6	Happy	3:41	TAEYEON	What Do I Call You (My Daisy ver.)	TAEYEON	EP	KR2020-12-15	SM Entertainment	SMK1214
1.6	Happy	3:41	태연	What Do I Call You	태연	EP	KR2020-12-15	SM Entertainment

Happy

Appears on releases