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!'
Later on, she was joined at the club by her friends Lydia Bright and Jessica Wright, who were also showing off the latest from their bikini collection.
Mecklenburgh's ex-boyfriend Mark Wright turned up this afternoon with a group of his male friends, who are on a stag week.
Come on in, the water's lovely: Mecklenburgh enjoys a cooling dip in the inviting swimming pool
All new curves: Jessica Wright shows off her surgically-enhanced figure in a frilly aqua bikini
The 24-year-old was spotted topless enjoying a lazy breakfast with a male pal and two female companions at an outdoor cafe, before surrounding himself with more women at the beach club.
Lucy later changed into a bright pink and white strapless bikini to socialise with her TOWIE co-stars around the pool at the Buddha Beach bar.
Shady lady: Lydia Bright - the only castmember who doesn't use fake tan - showed off her natural glow in a black two-piece
She was joined by Lydia Bright, who slipped out of her white sundress to reveal a tiny black bikini.
Lydia and Lucy chatted to Lydia's on/off boyfriend James 'Arg' Argent and Lucy's ex-boyfriend Mark Wright by the pool - something Mark's fiancée Lauren Goodger may not be pleased about.
Costume change: Lydia slipped out of her sun dress and Lucy changed into a bright pink bikini to party at the Buddha Beach bar
Gotcha! After throwing her in the pool the day before, Mark poured a bucket of icy water over poor Lydia
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.
Revenge: Lydia had a sodden Mark's friends in fits of laughter when she got her own back
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 Buddha Beach on Saturday.
Meanwhile, rival club promoter Joey Essex will be hosting one of his 'Reem' parties at Buddha Beach Club on Thursday.
Here come the girls: Sam and Amy make their Marbella debut with girlfriends at a party last night
Time to party: Sam and her girlfriends have been in Marbella all week but have stayed out of the spotlight until now