Video Description: Welcome to the 2015 Orange Bowl where two of the hottest teams in college football will kick off the College Football Playoff when No.1 Clemson and No. 4 Oklahoma face off. The Tigers are the country's last undefeated program after ripping through the ACC and ranked opponents like No. 8 Notre Dame, No. 9 Florida State and No. 10 North Carolina. The Sooners can't match that perfect record thanks to an early-season upset to 5-7 Texas, but wins over No. 11 TCU, No. 16 Oklahoma State and No. 17 Baylor have validated their late run to football's final four.