David Foster's Daughters Sara and Erin Joke They'll Have This Role in Katharine McPhee Wedding

7:51 PM PDT, Mon Sep 23, 2018

ET caught up with the Foster sisters at day 1 of the 2018 iHeartRadio Music Festival in Las Vegas, where they spoke about their father's upcoming nuptials to the 34-year-old actress. IHeartRadio Music Festival airs on the CW Oct. 7 and 8.  

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David Foster's Daughters Sara and Erin Joke They'll Have This Role in Katharine McPhee Wedding

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