Hot-Weather Beauty Tips and Top Travel Products

Clear the metal detectors but keep all your essentials close, like Bliss Clog-Dissolving Cleansing Milk ($28). Prada Infusion d'Iris purse spray ($74). Fekkai Technician Shampoo ($9). Tarte 24/7 Lip Sheer ($14). Clinique Dramatically Different Moisturizing Lotion ($12.50). Essie nail polish in Secret Stash ($8). Prescriptives AnyWear Multi-Purpose Makeup Stick ($35). Benefit A Little Bit Bad Gal Lash mascara ($9). Flight 001 Nomadic clear case ($5). Sequin ring. Top it off with a Smythson of Bond Street passport holder.

Though she's only in her 20s, Heroes star Kristen Bell is already a pro when it comes to protecting her skin. "I use a stronger SPF in the summer," she says. Her favorite is Clinique Moisture Sheer Tint SPF 15 ($26). "It gives my skin great coverage and soaks in, so even on a hot day it won't turn smudgy like foundation."

Clinique Moisture Sheer Tint SPF 15 ($26).

"I try to be natural in summer, yet I like to have a healthy glow," says Christine Taylor, the 37-year-old actress and wife of Ben Stiller. Prescriptives Traceless foundation ($32.50) is her top pick for standing up to the heat, and she slathers on Kate Somerville Deep Tissue Repair ($150) "day and night."

Prescriptives Traceless foundation ($32.50)

Kate Somerville Deep Tissue Repair ($150).

Busy mom Paulina Porizkova, 44, doesn't believe in manicures, but feet are a different story. "They need all the help they can get," says the ex-supermodel, who favors Essie Nail Polish in Can't Filmfest ($8). In the summer, she also uses Fekkai Technician Color Care Shampoo ($23).

Essie Nail Polish in Can't Filmfest ($8).

Fekkai Technician Color Care Shampoo ($23).

Sex and the City's sexiest cast member, Kim Cattrall is clearly doing something right. On her list of summer beauty staples are Murad Oil-Free Sunblock SPF 30 ($31), Jo Malone Scent Surround Spray in Lino nel Vento ($55), and Benefit Benetint Lip Balm ($20). She completes her look with "an Ecuadorean panama hat and Roberto Cavalli sunglasses."

Benefit Benetint Lip Balm ($20).

Jo Malone Scent Surround Spray in Lino nel Vento ($55).

If Diane Keaton, 63, looks better than ever, credit an effective regimen. She relies on L’Oréal Paris Revitalift UV Daily Moisturizing Cream with Mexoryl SX ($21.99). "I wasn't careful when I was younger, so I visit a dermatologist for skin-cancer checks," she says.

L'Oréal Paris Revitalift UV Daily Moisturizing Cream with Mexoryl SX ($21.99).