With regard to question #19, I may have mistaken this term of endearment for an actual single name, though it has sometimes been given as a personal female name in the USA {I've seen given to African Americans more than any other racial/ethnic group}. But it is also the name of a an Indian supermodel and a Bollywood actress.

And since, I may have goofed by including this term of endearment as a single name, I'm gonna post that answer-right-now:

19. What is the single name of the very popular Swahili love song whose title translates as "My angel" and whose lyrics in English begins "My angel, my angel, I love you, my angel". Hint: This song's name is also the name of an Indian supermodel and a Bollywood actress.-"Malaika"

Here's the entry from http://en.wikipedia.org/wiki/Malaika [I've placed the information about the song first]

"Malaika, which means "angel" in Swahili, was a song first recorded by Kenyan musician Fadhili William and his band Jambo Boys in 1960. Authorship of the song is often attributed to Fadhili William, but that is somewhat disputed.

It was later re-recorded at Equator Sound Studios by the British-born Kenyan music promoter Charles Worrod, who marketed the ballad to eventually becoming an internationally acclaimed song. The song went on to be popularised by international artists such as Helmut Lottie, Hep Stars, Rocco Granata, Miriam Makeba, Harry Belafonte, Pete Seeger, Boney M and Angélique Kidjo".

"Malaika" is also a spider genus (Phyxelididae) found in South Africa.

"Malaika" is also the name of a best selling music group in South Africa.

-snip-

The single name of the Bollywood actress/supermodel is Malaika Arora Khan