Chelsea Krost makes a good living as a “guestpert.” The Boca Raton beauty, now based in NYC, has appeared on Today, The Tyra Banks Show, Good Day New York and doesn’t mind touching on sensitive topics and “girl” issues.

The Marymount College student — and onetime junior Miami Dolphins cheerleader — will be in town next Friday for a private event at North Miami High School to discuss her work as a U by Kotex Generation Know advocate. Her goal: to empower women through female health awareness.

The webcast star (www.ChelseaKrost.com) also has her own show on BlogTalkRadio Wednesday nights and a book ( Nineteen). Not bad for a 21-year-old.

The bachelorette

To all the single ladies: Gabrielle Union wants the world to know that her friend Zoe Saldana is doing “great” after splitting from The Words costar Bradley Cooper. “She’s awesome,” D-Wade’s girlfriend told People before hosting the 2013 BET Honors — airing 9 p.m. Feb. 11 — in Washington, D.C., on Saturday. “She’s dope.” Union, 40, rang in 2013 with her Constellation costar at the James Royal Palm Hotel.

Saldana loves hanging out in Miami. Anyone interested?

As for Cooper, he denies dating his Silver Linings Playbook costar Jennifer Lawrence. Hmmm, we’ll see about that.

By the sea

Ralph Pagano’s seaside Italian restaurant Alba is officially open at Sole on the Ocean Hotel, in Sunny Isles Beach. Enter for a chance to score an invite to the Hell’s Kitchen alumni’s VIP opening Thursday night by following Alba Seaside at www.facebook.com/AlbaSeaside. Don’t worry, we don’t think Gordon Ramsay is showing up.

Summer baby

Kim Kardashian got up bright and early Tuesday morning and let Today viewers in on a little secret: her due date is in July. The 32-year-old mom-to-be will give birth the same month as her niece Penelope, Kourtney’s daughter, was born. The fetus’ sex can be determined at about 16-20 weeks so we should be hearing about that soon, too, we’re sure. Keep up with all things Kardashian and then some when the sisters’ locally shot reality show, Kourtney & Kim Take Miami, airs 9 p.m. Sunday on E!

Model citizens

Lenny Kravitz has yet another cool gig. The rocker-actor-interior designer is the face of fashion brand Eleven Paris for its 10th anniversary. The rustic-chic shoot for the Spring/Summer collection recently went down in Miami photographed by Renaud Corlouer.

And Russian supermodel Irina Shayk — well, her bikini — got heads turning on the sands behind the Soho Beach House the other day. Cristiano Ronaldo’s galpal was flown in by Colombian swimwear label Agua Bendita (Blessed Water).