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Zayn has publicly declared his pag-ibig for the Little Mix singer, saying the three big words over Twitter.
"A very special happy birthday to my baby Perrie," Zayn tweeted. "Love you."
Perrie celebrated her birthday sa pamamagitan ng going on a shopping spree with Zayn and her mother.
"They make a lovely couple," Perrie's mum recently revealed. "I really hope they make a go of it.
"I've been to his house and met the two of them with his mum and his three sisters, and I think they're really good for each other."