Powell, a 19-year-old wakeboarder
, was competing in England before jetting off to Australia to celebrate his girlfriend's big day. Irwin gushed that her guy has become "very good" at gifts, and has learned that she's not great with surprises. "He's better off giving me hints leading up to my birthday, rather than [me going] crazy wanting to know what he's gotten me," she quipped. "He decided that he'd get me a sequence of gifts in England. He actually told me one of them. He said, 'You love English Breakfast tea so much.' That's my favorite kind of tea, [so] he wanted to give English Breakfast tea from England. ...So, he's gotten me tea and a few other random things that I'm not sure of yet -- but he's very sweet."