Valentina Attard writes about the encounter on her Tumblr blog:
Okay so as most of the people that have recently followed me i have been the girl that got her selfie ”photobombed” by Beyonce when in fact i asked her for the photo so she posed and smiled as the perfect person she is!
Valentina Attard: Instagram.
Daily News writes about it, embeds the Instagram, but doesn't link back.
Culture Map has no link to the Instagram either.
Kiss108 doesn't link to anything and doesn't even show the photo.