Celeb Spotter 019: Hilary Swank rocks a mini skirt and Gigi Hadid goes incognito

Hilary Swank turns heads in a sexy mini skirt, Gigi Hadid goes stylishly incognito and Hailey Baldwin stuns in a slinky slip dress in some of our favorite celebrity sightings from this week.

SEE ALSO: Dakota Johnson steps out with younger sisters Stella, 20, and Grace, 17 in Italy

More notable spottings came from Justin Theroux, who rocked some on-trend tinted red sunglasses, and Bella Hadid and Winnie Harlow, who partied together at the Bootsy Bellows Pop Up in Monaco.

Justin Bieber was also spotted out and about with pal Patrick Schwarzenegger in SoHo. Schwarzenegger appeared to be cracking Bieber's back as he embraced him from behind, but we're really not sure what was going on there. They also made waves during their surprise visit to a vineyard in the Hamptons.

See our favorite celebrity sightings from this week in the gallery below:

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Celeb Spotter 018: Kourtney Kardashian and Kendall Jenner heat up Cannes
Celeb Spotter 017: Bella Hadid, Emily Ratajkowski and Hailey Baldwin head to Cannes
Celeb Spotter 016: Ashley Graham, Gisele Bundchen and J.Rod step out solo