The fans at Z100 New York's annual iHeartRadio Jingle Ball at Madison Square Garden were in for a shock Friday night Katie Holmes and daughter Suri Cruise showed up onstage to introduce Taylor Swift, who closed the show!A day after the show, Katie spoke with Extra's AJ Calloway, who pointed out that she was the coolest mom in the world right now. She replied, We had a great time and it was so much fun and I think I have the coolest daughter in the world, so I felt lucky to be up onstage with her.