Justin Bieber frolics around Miami in wet boxer briefs as he celebrates...

Justin Bieber frolics around Miami in wet boxer briefs as he celebrates engagement to Hailey Baldwin

Romantic break: Justin Bieber and his fiancee Hailey Baldwin were spotted poolside in Miami on Saturday

Hailey Baldwin and Justin Bieber’s whirlwind relationship and engagement surprised many.

But the couple looked happier than ever as they were spotted in Miami, Florida together on Friday.

The Canadian pop star, 24, looked like he left his swim shorts at home as her sauntered around their hotel in a pair of white boxer briefs that left little to the imagination.

Hailey was wearing the same cobalt two piece, which flashed her flat tummy, as she was seen wearing when they left their hotel in NYC.

They wasted no time getting poolside, which the Baby crooner stripping off to his boxers.

The Sorry singer flaunted his tattoos, alongside the daughter of Stephen Baldwin – who has carved out a career as a model.Inked up: The Sorry singer flaunted his tattoos poolside

Happy girl: The 5ft 7in beauty topped up her already glowing tan, as she could not wipe the smile from her pretty face

The 5ft 7in beauty topped up her already glowing tan, as she could not wipe the smile from her pretty face.

Her blonde tresses were sleeked into a messy bun, secured with a scrunchie.

In a further nod to the 1980s, she added giant hoop earrings.

No swim shorts? Justin jumped in to the water wearing just his white boxers

Justin had confirmed their engagement on Instagram on Monday after days of speculation.

He shared two loved up pictures with a gushing caption: ‘Was gonna wait a while to say anything but word travels fast, listen plain and simple Hailey I am soooo in love with everything about you!

‘So committed to spending my life getting to know every single part of you loving you patiently and kindly,’ he added.

He continued to gush: ‘I promise to lead our family with honor and integrity letting Jesus through his Holy Spirit guide us in everything we do and every decision we make. My heart is COMPLETELY and FULLY YOURS and I will ALWAYS put you first!

‘You are the love of my life Hailey Baldwin and I wouldn’t want to spend it with anybody else. You make me so much better and we compliment each other so well!! Can’t wait for the best season of life yet!’ (sic)

Baldwin also confirmed the engagement on Twitter.

‘Not sure what I did in life to deserve such happiness but I am so utterly grateful to God for giving me such an incredible person to share my life with! No words could ever express my gratitude ?’ she wrote.

Going strong: Their romance looked like it was continuing to heat up as they locked lips while embracing in a hot tub on Friday