This kid officially won Valentine's Day this year . . .
Zack Peterson is a high school senior in Holmen, Wisconsin, just north of La Crosse.
And he showed up on Tuesday with 625 long-stem roses, so he could give one to every girl in school.
All of the girls lined up in one of the hallways to get a rose from him, and he got a LOT of hugs in return. Some of them even CRIED.
He wanted it to be a surprise, so he didn't even tell his sister, who's a sophomore. He used a bunch of air fresheners to mask the smell in their house.
He says he ordered the flowers in bulk through Sam's Club, and it cost him about $450. Then he spent eight hours over the weekend trimming each rose, and making sure they were all perfect before he handed them out.