Celebrities are influencers, people follow pop singers and reality TV stars enough to care about what phones they use.

Here’s a rundown of the stars and the mobile devices they use.

Lady Gaga
She’s been spotted using a BlackBerry Tour, BlackBerry Curve and iPhone.

Justin Bieber
The Bieb has been spotted with both BlackBerry and iPhone, but question-and-answer sites say he likely uses an iPhone.

Taylor Swift
The pop singer tweets on an iPhone but has been spotted carrying a BlackBerry Tour.

Lindsay Lohan
The troubled starlet is known to use a red painted or cased BlackBerry Curve.

Rihanna
The singer was spotted in Madrid last month toting a White BlackBerry Bold.

Katy Perry
The singer has been seen in years past with a BlackBerry, but she recently performed songs from her new album Teenage Dream to promote the new Windows Phone 7, according to VH1.com.

Kim Kardashian
The star of Keeping Up with the Kardashians uses a White Blackberry Bold 9780 and had previously use a BlackBerry Tour.

Kanye West
CelebrityBlackBerrySightings.com spotted him with what looked like an older model BlackBerry Curve in early 2010. The rapper uses UberTwitter as well, an application that up until recently was dedicated solely to BlackBerry devices.

Snookie
Jersey Shore star Nicole Polizzi is said to use a BlackBerry Curve, although she previously had a pink Palm Centro.

Lea Michele
The Glee star tweets occasionally with an iPhone, and coolspotters.com has a photo of the actress with a an “environmentally friendly” case for the iPhone.