Julianne Hough Sucks Face with Seacrest Knockoff

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A poor-man”s Ryan Seacrest got a little octopus at Nobu restaurant … courtesy of Ryan”s ex, Julianne Hough.

Our sushi sources tell us … the 2 were all over each other like white on rice … even licking each other as they munched on raw fish.

On the Seacrest front … we”re told he”s moved on.

After all, there are plenty of fish in the sea.