Celeb Tracker: The 5 Best Photos of the Week

From Taylor's Frozen duet in Tampa to JLo's skeletal Halloween, here's what some of your favorite stars were up to this week.

Michael Stewart/Getty
Michael Stewart/Getty
1
Alicia Keys
The singer is all smiles at the finish line of the New York City Marathon.
Tim Boyles/Getty
Tim Boyles/Getty
2
Taylor Swift & Idina Menzel
The singers join forces during Swift's 1989 Tour stop in Tampa, Florida where the greeted the crowd with a double-sized version of Frozen's 'Let It Go'.
Getty Images
Getty Images
3
Liev Schrieber & Naomi Campbell
The married actors treat their sons Kai and Sasha to a screening of The Peanuts Movie.
Mike Coppola/Getty
Mike Coppola/Getty
4
Jennifer Lopez
It's a trio of sympatico costumes for Nicole Sherzinger (left), Casper Smart, (center) and Jennifer Lopez at Heidi Klum's annual star-studded Halloween party.
Christopher Polk/Getty
Christopher Polk/Getty
5
Selena Gomez & Amy Schumer
The singer and comedienne sneak in some girl time during the Hollywood Film Awards.