Here's a quick guide to help あなた see who Selena's tweeting and what she's tweeting about.

First, あなた can go to:
link]http://www.whocelebstweet.com/twitter/selenagomez/who/[/url][/url]

On this page you'll find a 一覧 of:
1) non-celebs she's tweeted (could be you?!)
2) celebs she's tweeted
3) celebs who've tweeted her

Note that あなた can click on This Month, Last 30 Days, etc to zoom in または out on her activity.

Second, あなた can go to:
link]http://www.whocelebstweet.com/twitter/selenagomez/talksabout/[/url][/url]

On that page you'll see a 一覧 of words that she uses a lot. Click on the word and あなた can see her tweets that include that word.

Third, あなた can see her tweeting back and forth with celebs. As an example, check out her chatter with Justin Bieber:
link]http://www.whocelebstweet.com/chatter/selenagomez/justinbieber/[/url][/url]

Enjoy and let me know if this was helpful!