Olivia Jane d'Abo (born 22 January 1969) is an English-American actress, singer, and songwriter. She is known for her role as Karen Arnold, Kevin Arnold's rebellious teenage hippie sister in the ABC comedy-drama series The Wonder Years (1988–1993), and recurring villain Nicole Wallace in Law & Order: Criminal Intent. She was formerly engaged to singer Julian Lennon. D'Abo is a singer-songwriter, guitarist and pianist. She has composed and performed for various soundtracks. Her single "Broken" is from the movie Loving Annabelle. Her debut album Not TV was released in July 2008. D'Abo also performed backing vocals for Julian Lennon's Help Yourself, and a duet with Seal's "Broken". She also co-wrote the song "Love Comes from the Inside" with Italian singer Laura Pausini, which was featured on Pausini's English language debut album From the Inside.

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