All Alex & Sierra's performances were absolutely amazing but -
here's My personal top 3 favorites:
#1: Semifinal - Gravity
#2: Week 6 - Say Something
#3: Week 4 - Best Song Ever
Here's a list of all the songs:
Audition - Toxic [0:08]
Four Chair Challenge - You're The One That I Want [2:20]
Week 1 - Blurred Lines [3:48]
Week 2 - Heard It Through The Grapevine [5:23]
Week 2 - Give Me Love [7:00]
Week 3 - Addicted To Love [9:04]
Week 4 - Best Song Ever [11:43]
Week 5 - I Knew You Were Trouble [14:35]
Week 6 - Say My Name [17:32]
Week 6 - Say Something [19:36]
Semifinal - Falling Slowly [21:54]
Semifinal - Little Talks [23:54]
Semifinal - Gravity [26:21]
Semifinal - Let Her Go [29:04]
Finals - Give Me Love [31:32]
Finals - Bleeding Love [34:04]
Finals - Say Something [36:57]
Finals - We Will Rock You [39:14]
Final - Love Me Again [41:29]
Final - All I Want For Christmas Is You [44:09]