Very good! At the risk of spoiling the game for others, here are the answers, in order of appearance in the article...
1- Memory (Cats)
2- How Are Things in Glocca Morra? (Finian's Rainbow)
3- Some People (Gypsy)
4 & 5- Tonight & Tomorrow (West Side Story & Annie)
6- Somewhere Over the Rainbow (The Wizard of Oz)
7- Happiness (You're a Good Man, Charlie Brown was the one I had in mind, but later on I realized there are at least two other musicals with songs called "Happiness": Company and Scrooge)
8- A Little Priest (Sweeny Todd)
9- You Can't Get a Man With a Gun (Annie Get Your Gun)
10- Wouldn't it Be Lovely (My Fair Lady... okay, this one got messed up. I had the correct title, "Wouldn't it Be Loverly", but the editor evidentally thought it was a mistake and 'corrected' it.)
11- On the Steps of the Palace (Into the Woods- my favorite show, too!)
12- Oklahoma (Oklahoma!)
13- Broadway Baby (Follies)
Okay, you were able to correctly match 9 songs with their respective musical, and were able to pick out the titles of 11 of them, so I guess that evens out to about a 90 or so!