Looks like this contest is for all Canadian residents, excluding Quebec

ways to enter
1. visit longlivsummer.com and fill in the entry form
2. when you finish the form it prompts you to share on Facebook, Twitter and Goolge+ for additional entries
3. Post a pic on Facebook, Twitter, Instagram and Google+ and tag it #longlivsummer for more entries too! "Your most legendary summer moment of 2015"

Here's the copy from the site:

LONG LIV SUMMER from LIV Apartments

Summer is here and we want to make it last forever! That's why we want to send YOU and a friend to South Beach Miami!

All summer long we're looking for your most legendary summer moments: patio drinks with friends, long weekend camping trip, the best music festival selfies, and more!

LIV Apartments is redefining apartment living in Ottawa. Brand new apartments in Ottawa's Centretown neighbourhood with all the extras - Rooftop Terrace and Fitness Centre, Pet Spa and Rooftop Dog Run, Full Concierge and Valet services, and so much more!