Star Tracks: Tuesday, November 16, 2010

Meanwhile, a globe-trotting Taylor Swift waves to fans upon arriving at Tokyo's Narita International Airport on Tuesday.

Prince William and his fiancée, Kate Middleton, greet photographers at St. James's Palace in London on Tuesday after announcing their engagement. The Prince gave his bride-to-be the oval sapphire ring that belonged to Princess Diana.

Fashionistas Mary-Kate and Ashley Olsen play up their similarities on Monday night at the CFDA Vogue Fashion Fund Awards in New York.

Harry, meet Carrie! Harry Potter and the Deathly Hallows: Part 1 star Daniel Radcliffe says a quick hello to Sarah Jessica Parker, Matthew Broderick and their 8-year-old son James Monday at the film's star-studded New York City premiere.

Costars Jake Gyllenhaal and Anne Hathaway stick together Monday evening while screening their new movie, Love and Other Drugs, in New York.

Julianne Hough is hot on her heels Monday night at the Burlesque premiere at Grauman's Chinese Theatre in L.A. The film – which also stars Cher and Christina Aguilera – hits theaters Nov. 24.

Just what the doctor ordered! James Franco gets his dose of culture while co-chairing RxArt's 10th anniversary party at the Art Director's Club Monday in New York.

Jay-Z flashes a smile Monday night while signing copies of his new book, Decoded, at the New York Public Library, where he kept guests entertained with stories about his impressive musical career.

She knows how to travel in style! Gwen Stefani, toting one of her own L.A.M.B. handbags, makes a chic arrival at Los Angeles International Airport on Monday.

Call it black magic! Jennifer Aniston looks effortlessly chic decked out in a classic ensemble while out and about in Manhattan's Tribeca neighborhood Monday.

Fresh off the London premiere of Harry Potter and the Deathly Hallows: Part 1, Emma Watson continues to make the rounds Monday, arriving at The Late Show with David Letterman in New York City.

Rihanna pairs sleek new tresses with an on-trend shearling jacket while heading to a meeting Monday in New York.

Reality starlets Kim and Kourtney Kardashian show the Big Apple some love while taping the opening promo of Kourtney and Kim Take New York atop a double-decker bus on Monday.

Svelte bride-to-be Nicole Richie stays in tip top shape at a Studio City, Calif., gym on Monday.

It's official! Christina Aguilera cements her mark on Hollywood, accepting a star on the Walk of Fame on Monday.

Whitney Port gets hands on at a Seventeen magazine breakfast in N.Y.C. on Monday, supporting healthy body image initiatives for women.