Do you know of a song that showcases a magnificent accent?

Anything in Portuguese with a Brazilian accent.

Bombastic

Li Lykke Timotej Zachrisson (born 18 March 1986), known as Lykke Li (Swedish pronunciation: [ˈlʏ.ˈkɛ ˈliː]), is a Swedish indie pop singer, songwriter and fashion model. Her music often blends elements of indie pop, alternative, and electronic; instruments in her songs include violins, synthesisers, tambourines, trumpets, saxophones, cellos, and African drums.[6] Li possesses the vocal range of a soprano.[7] Her debut album, Youth Novels, was released in 2008, her second album, Wounded Rhymes, was released in 2011, and her most recent album, I Never Learn, was released in 2014.

I don't think I've ever heard any.

I don't hear the accents, but I like the vibe. :)

"Sakura", a traditiona. very famous, Japanese song.

"The girl from Ipanema," Astrud Gilberto.

"Thank heavens for little girls," Maurice Chevalier from the movie, Gigi with Leslie Caron.

Ooh. I like it!

I know that one, oddly enough. 

This one is sung in a Manchester accent:

Accents don't get much more magnificent than that, do they? Lol:)

"Yes" ... I do.

Maurice Chevalier - "Thank Heaven For Little Girls"