After not acknowledging Amy's achievement in a Neurological Magazine, she gets angry at Sheldon. Sheldon's plan of putting on his "Koala Face" and congratulating Amy's achievement failed, Sheldon's OTHER plan: Give her a Tiara. She feels like a princess and forgives Sheldon.
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#5
Suggested by
Nick Piazza
Raj's Bollywood inspired dream duet song with Bernadette