Preity Zinta
Don't call her bubbly! She hates it. Even so, Preity Zinta is synonymous with everything effervescent.
Her natural candor and chilled out disposition makes her a delight to watch. Not to forget the now-you-them-now-you-don't dimples!
Kundan Shah explored this aspect of Preity's personality rather successfully when he casted her in a role of an unwed mother in Kya Kehna.
Anyone else would have looked silly, even stupid, mouthing those lines in the heart-to-heart on the stage sequence, but Preity was simply amazing.