Seen here, from the episode "Supergirl:" Laura Vandervoort as Kara and Tom Welling as Clark Kent.
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Laura Vandervoort is seen here in the key role of Kara. She comes back on the episode aptly titled "Supergirl."
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Welcome back to Smallville, Laura Vandervoort. The actress returns on the final season as Kara.
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Smallville Season 10 Episode 3 Quotes

You can save your holier-than-thou, made for TV platitudes and drown them in some holy water, mister.

Lois

Fifty bucks says the crack pot with the blur in his bonnet is gunning for a little attention.

Lois