“C’est si bon” (Eartha Kitt)

Macarena
La Bamba

Another partial:
Hold on Tight by ELO

Mas que nada by Jorge Ben made popular by Sergio Mendez

Besame Mucho.

Oye Como Va
Voulez vous coucher avec moi

Remember These? "Guantanamera" The Sandpipers ('66)

"Eres Tu" Mocedades ('74)

I'll go with "entirely not" meaning some English, some foreign words...

Michelle - The Beatles, first came to mind, which has already been mentioned.
Que Sera, Sera (Whatever Will Be, Will Be) - Doris Day
Voulez-vous coucher avec moi - Lady Marmalade, Christina Aguilera, Patti LaBelle
Livin' la Vida Loca - and others by Ricky Martin

Feliz Navidad

Eres Tu
 

Eres Tu, mid-70's group from Spain called Mocedades

Another partial
 

Lady Marmalade - Patti Labelle and the Nightbirds

Frère Jacque

Lyrics?
 

I can’t remember all the lyrics to this song. There were so many. I think they were all in Spanish. The song - Tequila

La Bamba Richie Valens who was taken away at 17

Time to Say Goodbye (diet w Sarah Brightman)