The fashion worker, 19, is replacing her fake tan with a real glow as she wore a revealing multi-coloured swimsuit at the Buddha Beach Club in Puerto Banus this morning.
But despite her love of tanning, The Only Way Is Essex star practised safe sun and carefully applied sun cream before relaxing on a lounger.
That'll give you some interesting tan lines: The Only Way Is Essex star Lucy Mecklenburgh shows off her size 8 figure in a multi-coloured cut-out swimsuit at the Buddha Beach club in Puerto Banus
Clearly enjoying Day 2 of her holiday so far, Mecklenburgh Tweeted this morning: 'Lovin Marbs!'
Meanwhile, a short distance away, her ex-boyfriend Mark Wright was recovering from the first of many heavy nights planned out for his friend's stag week.
The 24-year-old was spotted topless enjoying a lazy breakfast with a male pal and two female companions at an outdoor cafe.
Come on in, the water's lovely: Mecklenburgh enjoys a cooling dip in the inviting swimming pool
Upmarket: Mecklenburgh chose to sunbathe at one of the TOWIE gang's regular Marbella haunts Buddha Beach
Wright, James 'Arg' Argent, Jack Tweed and a host of their friends from Essex have travelled to the Spanish resort for their pal Timothy Langer's stag.
And it appears it was quite the wild night, given Arg's Twitter updates over the past few hours.
He wrote: '1st night: T-shirt got ripped off me, Mark was paraletic (sic), Someone done a poo in my mate's suitcase and stuck a toothbrush up his bum TBC...
'Mate got bucket of water chucked over him twice, Mm and Lydia had argument (then made up). Shutters in hotel got broke.'
Arg's comment about on/off girlfriend Lydia Bright have further fuelled speculation their relationship is back on again, despite breaking up in the second series of TOWIE.
But he admitted the 20-year-old was in a furious mood last night when she was thrown in a pool while full-dressed.
He wrote: 'Lydia just got thrown in the pool with her clothes on by all the boys! She really ain't impressed, Bad start to the hol.'
Feed the hangover: Mark Wright enjoys a slap-up breakfast with a friend and two female companions in a Marbella cafe
Although Mecklenburgh and Bright flew out on the same flight as the men, they have been spending a lot of time in separate boys and girls camps.
During their Marbella vacation, Wright, Arg and their gang are planning to party every night.
Club promoter Wright - whose fiancée Lauren Goodger is back home in Essex, is expected at Pangea tonight, Tibu on Thursday, a pool party at the Sisu Hotel & Spa and Pangea again on Friday and hosting his Love Juice night at Buddah Beach on Saturday.
Meanwhile, rival club promoter Joey Essex will be hosting one of his 'Reem' parties at Buddha Beach Club on Thursday.
Recovering ok: The gang recounted the previous night's wild events