Here's Charles performing "I'll String Along with You" by Harry Warren and Al Dubin.
Here he's singing Cole Porter's "The Great Indoors." As mentioned at the ending, Charles regarded this song as being autobiographical!
Here is Jule Stein and Sammy Cahn's exquisite "You Love Me" performed so beautifully by Charles. Doris Day has a lovely recording of this, and I think she may have introduced it.