Here are some definitive versions of some Pop songs, most of which have already been named:

"White Christmas" ~ Bing Crosby

"Over The Rainbow" ~ Judy Garland

"Mona Lisa" and "Nature Boy" ~ Nat Cole

"Moon River" ~ Andy Williams

"Marie" ~ Tommy Dorsey Orchestra

"The Gypsy" ~ The Ink Spots

"You Belong To Me" ~ Patty Page

"Begin The Beguine" ~ Artie Shaw Orchestra

"Kiss Of Fire" ~ Georgia Gibbs

"Rudolph The Red-Nosed Reindeer" ~ Gene Autry