Miley Cyrus and Liam Hemsworth are showing us how to do a Summer vacation. The couple returned to the ocean at Byron Bay, Australia on Friday after having a flirty beach day at the same location earlier in the week. Miley put her rock-hard abs on display in a black bikini and ripped denim shorts, while her fiancé kept things simple in a pair of swim trunks. At one point, Liam, who turned 28 earlier this month and got a sweet birthday shout out from Miley, found himself immersed underneath the water while the "Malibu" singer looked on. While Miley and Liam are reportedly in "no rush" to get married, they couldn't look more in love while vacationing in Liam's native country — where it's currently the Summer season. Keep reading to see more envy-inducing photos of the ridiculously hot pair frolicking on the beach.