Apparently Mina Joksimović (see link), the daughter of popular Serbian singer/songwriter Zeliko Joksimovic, is a big fan of Luka. Few months back she posted one of Luka's Official Facebook Photos with the caption, "Hi Luka--marry me"
If I am reading the second article correctly, when the magazine asked Luka about the post recently, he said ,"A little too late, unfortunately. But I recommend my colleague here [Stjepan?], he's a good guy, strong, powerful, his bank account is in good standing and he's just a good man"