Researcher Elizabeth Currid-Halkett says celebrity can be boiled down to a simple formula. Caiaimage/Sam Edwards/Getty Images/Caiaimage hide caption

This War of Mine 11 Bit Studios hide caption

Cary Grant and Rosalind Russell starred in the 1940 farce His Girl Friday, where a newspaper editor tries to win back his ex-wife, an ace reporter. Columbia Picture/Archive Photos/Getty Images hide caption

A screenshot from Comic Relief's fundraising ad, featuring Ed Sheeran. He talks to a boy named J.D. in Liberia. Comic Relief via YouTube/Screenshot by NPR hide caption

Cocktail avocados: adorable, seedless — safer for those who can't cut the kind with a pit? Maanvi Singh/for NPR hide caption

Omarosa Manigault Newman was cast as a villain in The Apprentice by Donald Trump, who then brought her to the White House. Pablo Martinez Monsivais/AP hide caption

Reese Witherspoon in HBO's Big Little Lies. Witherspoon was nominated for a Golden Globe for best actress in a limited TV series or movie on Monday. Hilary Bronwyn Gayle/AP hide caption

According to a new note on The Wall Street Journal's style book, much of its coverage painted millennials with a broad and sometimes insulting brush. Optician Training/Flickr hide caption

Beyoncé performs at the Grammy Awards in Los Angeles on Feb. 12. "Instead of me telling someone how good I look, I can just send them a picture of Beyoncé in a queen's outfit," Youth Radio's Robert Fisher says. Lucy Nicholson/Reuters hide caption

Sam Rockwell and Frances McDormand star in the film Three Billboards Outside Ebbing, Missouri. Merrick Morton/Fox Searchlight hide caption

The first black British royal? Not so fast. Matt Dunham/AP hide caption