Fab or flop: Rita Ora's disco dress, Olivia Palermo's white lace and more

The dog days of summer are here and celebrities turned up the heat in hot styles!

Rita Ora looked like a modern disco queen in a sexy short-sleeved silver minidress and silver platform sandals. Glam makeup and pinstraight locks completed her hot look. (Similar dress here.) Olivia Palermo was a statuesque beauty in a gorgeous white pleated Self-portrait Amelia midi dress with delicate lace accents. A necktie and heels added an extra touch of polish.

Even Kendall Jenner, who covered up in high-waisted, wide-legged black slacks and cardigan added a sexy, stylish twist with a black satin bralette. (Similar here.)

SEE ALSO: Sexy Stars: Diane Kruger, Alicia Vikander and more stun in sultry looks

But while some stars totally shined, others missed the mark.

TV personality Erica Mena left very little to the imagination in a totally see-through silver tunic that put her bust on full display. Nastia Liukin slipped into a revealing black minidress with cutouts at the hipbones and a futuristic bustier bodice, but the look ended up looking more tacky than sexy. And AnnaLynne McCord looked ready for her Winter Olympics close-up in a figure skater-esque floral cape dress and mismatched nude heels.

See this week's best and worst dressed celebs in the slideshow above.

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