Taylor Michel Momsen (born July 26, 1993) is an American singer, songwriter, former actress, and model. She is known for being the lead singer and frontwoman of the American rock band The Pretty Reckless. She is also known for portraying the character of Jenny Humphrey on the CW teen drama series Gossip Girl (2007 -- 2012) and Cindy Lou Who in the film Dr. Seuss' How the Grinch Stole Christmas (2000).\n\nBased on this passage, who played cindy lou who in the grinch stole christmas? Let's give stream of consciousness first:
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The relevant sentence in the passage is: She is also known for portraying the character of Jenny Humphrey on the CW teen drama series Gossip Girl (2007 -- 2012) and Cindy Lou Who in the film Dr. Seuss' How the Grinch Stole Christmas (2000).
So, the final answer is Taylor Michel Momsen.
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