Misc: of which family are watermelons a member?

Questions

Which blues artist toured with u2 in 1989 throughout australia?

which canadian songstress won the eurovision song contest in 1987 singing for france?

which cher video was restricted to night play on mtv because of her rather revealing outfit worn in the video?

which commemoration to elvis was issued by the us post office in 1993?

Which country is lene from aqua from?