Stalker Sarah was hot on his trail, posting a pic of his car filled with balloons and writing: "Nadine's birthday balloons in @Harry_Styles car"
Yeah, it's not exactly a solid confirmation that the balloons are for her, right? Well...it appears she's been tweeting about her birthday, so connect the dots.
Color us extremely jealous. Maybe they're just friends and this isn't a romantic thing at all, but then again, remember when Harry bought 23 cupcakes for Taylor Swift's birthday?