I agree with SRS, and have been haunted by Saga of Jenny since I heard it on a radio show last summer; tracked it down on YouTube and Google and learned it (the only way to exorcise that kind of haunting). I think she would love that song, and it's a stunner. While I agree that Stormy Weather (and Memory and Over The Rainbow) would be "Ins" more than Jenny (which tells a delicious and blackly humorous story and allows both bounce and a wee bit of vamping, which Susan would love :-), what about "Cry Me A River" rather than Stormy Weather? Less covered, and she can grab them at the first six notes, and impress the audience with her phrasing at the "You drove me/Remember" section. Admittedly, the emotional tone can be slightly vindictive (a matter of artistic interpretation?). I've always loved the emotional texture of "I'll be Seeing You," but there are not as many opportunities to dazzle in that song; still, it's a lovely tearjerker for the audience members who "get" the context. For sheer beauty, I have always loved, "O Mio Babbino Caro," she's a mezzo but she has the range for that. Every mezzo does Habanera, so probably not that.