Photo by: Jason Kempin / FilmMagic
Hilary Duff Reading Hockey for Dummies for Boyfriend | Haylie Duff, Hilary Duff
How does Hilary Duff keep conversation hot with her hockey-star boyfriend Mike Comrie? Older sister Haylie Duff spilled the beans to PEOPLE Tuesday.

"I actually caught her with a copy of the Hockey for Dummies book," Duff, 22, said at the opening of the Foley+Corinna store in West Hollywood. Big sis says she "adores" Comrie – and says it's actually distance that makes things work between him and 20-year-old Hilary. "He lives in New York and she lives here, and they really put in a big effort to see each other."
– Shayna Arnold
This week's cover

On Newsstands Now!

JOSH & FERGIE: ROCKED BY SCANDAL

Did he cheat with a stripper?

Married less than a year, the couple denies an Atlanta woman’s claims that she and Josh had a fling
Note that this week’s cover of PEOPLE may differ regionally

Save $1.00 off this week's issue. Click here for coupon