ifonlyilivedinNY pretty much covered it. She sang a little Phantom talking about her Les Miserables audition. Marked and a capella.
The improvised Glee section with audience suggestions included: Don't Stop Believin, It's All Coming Back to Me Now, Paradise by the Dashboard Light, Taking Chances
Then for the planned Glee songs she sang Being Good Isn't Good Enough... applause then right into Happy Days Are Here Again (I wish this had been a duet with Groff)... more applause then Papa Can You Hear Me with a nice solo violin highlight... ending on Maybe This Time.
Also, for the record, I was in the Dress Circle and that was the perfect price point for me with a slightly rowdy crowd. I do think she sounded fantastic but sometimes they overamplify at Carnegie Hall so there's not much benefit to me in being closer.