For fans who first fell in love with because of her dance numbers:
Partner (2007): A remake of Hitch. Katrina played the bubbly, vibrant "Dr. Jyoti." Her chemisry with Govinda (as the dancing coach) was surprisingly fresh. The song Soni De Nakhre became an anthem.
Welcome (2007): A cult classic. As the mute (later revealed to be silent) Sanjana, Katrina delivered a purely physical performance. She didn't speak until the climax, which cleverly hid her accent issues. This remains one of the most re-watchable Kat movies.
Singh Is Kinng (2008): Playing Sonia Singh, she graduated to the "love interest with a spine." Her pairing with Akshay Kumar showed her versatility beyond the Khan circle.