Demi Lovato – Demi Lovato visits "Jimmy Kimmel Live" in Los Angeles.
Joseph Gordon-Levitt – Joseph Gordon-Levitt films a movie scene in New York City.
Katherine Heigl – Katherine Heigl attends a friend's Halloween party in Los Angeles.
Khloe, Kim, Kourtney Kardashian – Khloe, Kim and Kourtney Kardashian visit "Jimmy Kimmel Live" in Los Angeles.
Gwen Stefani – Gwen Stefani attends a Halloween party in Beverly Hills.
Topher Grace – Topher Grace goes to a Halloween party in Beverly Hills.
Jessica Alba – Jessica Alba grabs coffee with her daughter in Beverly Hills.
Alessandra Ambrosio – Alessandra Ambrosio enjoys Halloween with her daughter in Brentwood.
Russell Brand – Russell Brand attends a luncheon in Los Angeles.
Leighton Meester, Penn Badgley – Leighton Meester and Penn Badgley film a "Gossip Girl" scene in New York City.
David Hasselhoff – David Hasselhoff visits "Extra" in Los Angeles.
Sofia Vergara – Sofia Vergara goes shopping in Los Angeles.
Naomi Watts – Naomi Watts celebrates Halloween with her family in New York.
Jennifer Garner – Jennifer Garner celebrates Halloween with her family in Los Angeles.
Mario Lopez – Mario Lopez spends time with his family in Los Angeles.
Alexis Denisof, Alyson Hannigan – Alyson Hannigan and her husband Alexis Denisof take their husband to a Halloween party in Brentwood.
Hilary Duff – Hilary Duff goes shopping in Los Angeles.
Mickey Rourke – Mickey Rourke gets his hand and feet imprinted on Hollywood Boulevard in Hollywood.
Zoe Saldana – Zoe Saldana leaves an office building in Beverly Hills.
Miranda Kerr – Miranda Kerr goes to a Halloween party in New York City.
Kelly Rowland – Kelly Rowland arrives in London.
Elisabetta Canalis – Elizabeta Canalis and Mehcad Brooks go shopping in Italy.
Pippa Middleton – Pippa Middleton heads to work in London.
Britney Spears – Jason Trawick and Britney Spears leave a theater in London.
Maria Menounos – Maria Menounos films an episode of "Extra" in Los Angeles.
Melanie Griffith – Melanie Griffith goes shopping in Hollywood.
Joe Jonas – Joe Jonas arrives at Los Angeles.
Owen Wilson – Owen Wilson attends John Lasseter's Hollywood Walk of Fame ceremony.
David Arquetter – David Arquette visits "Jimmy Kimmel Live" in Hollywood.
Selena Gomez – Selena Gomez roams around Beverly Hills.
Katie Couric – Katie Couric attends a celebration in New York.
Sean "Diddy" Combs – Sean "Diddy" Combs leaves a restaurant in Los Angeles.
Andie MacDowell – Andie MacDowell attends a gala in New York.
Hugh Jackman – Hugh Jackman picks up his wife and daugher in New York.
Julianna Margulies – Julianna Margulies attends a gala in New York.
Justin Timberlake – Justin Timberlake leaves a radio station studio in London.
Kelly Osbourne, Lourdes Leon – Kelly Osbourne and Lourdes Leon at a launch in New York City.
Miranda Kerr – Miranda Kerr arrives at a hotel in New York City.
Hilary Duff – Hilary Duff attends pilates in Toluca Lake.
Robert Pattinson, Kristen Stewart, Taylor Lautner – Robert Pattinson, Kristen Stewart and Taylor Lautner have their hand and footprint ceremony in Hollywood.
Kate Bosworth – Kate Bosworth leaves a salon in Beverly Hills.
Regis Philbin – Regis Philbin shoots a commercial in New York City.
Nick Jonas – Nick Jonas leaves a restaurant in Los Angeles.
Colin Farrell – Colin Farrell grabs lunch in Los Angeles.
Paris Hilton – Paris Hilton poses for an event in Barcelona.
Reese Witherspoon – Reese Witherspoon leaves a restaurant in Brentwood.
Fergie – Fergie arrives at Los Angeles.
Heidi Klum – Heidi Klum roams around Santa Monica with her children.
Rose McGowan – Rose McGowan leaves a salon in Beverly Hills.
Kristin Cavallari – Kristin Cavallari attends a Nintendo event in Hollywood.