Emy Jackson's is called "Crying in a Storm".
Melon Kinenbi's is actually a cover of a japanese cover (I think from the 90's) of Jackson's original english version from the 60's.
Melon's is a cover of Anzai Maria "
Namida no Taiyou" from 1973, which was a cover of Emy Jackson's "
Crying in a Storm(涙の太陽)"
EDIT: The Emy Jackson song was called Namida no Taiyou as I said before, based on the cover of the single
See the big 涙の太陽 there?
And here you have Emy Jackson, Anzai Maria and Melon Kinenbi together for a performance of Namida no Taiyou