As you might expect, Twitter’s list of the most retweeted tweets of all time is dominated by celebrities.

And it changes a lot. Currently, Twitter’s retweet champion is President Barack Obama, with his November 7 re-election victory tweet racking up more than half a million shares, good enough to keep previous title-holder Justin Bieber very much in his taillights.

Here are Twitter’s ten most retweeted tweets of all time.*

1. Barack Obama (500K+)

Four more years. twitter.com/BarackObama/st…

— Barack Obama (@BarackObama) November 7, 2012

2. Justin Bieber (200K+)

RIP Avalanna. i love you — Justin Bieber (@justinbieber) September 26, 2012

3. T.J. Lang (98K+)

Fuck it NFL.. Fine me and use the money to pay the regular refs. — TJ Lang (@TJLang70) September 25, 2012

4. Floyd Mayweather (89K+)

Manny Pacquiao I’m calling you out let’s fight May 5th and give the world what they want to see. — Floyd Mayweather (@FloydMayweather) January 10, 2012

5. Kim Kardashian (68K+)

A 15 year old girl who is terminal w/ cancer has made a bucket list. 1 of her wishes is to trend on Twitter. Give a RT #alicebucketlist — Kim Kardashian (@KimKardashian) November 27, 2011

6. Lady Gaga (34K+)

Never be afraid to dream. — Lady Gaga (@ladygaga) June 17, 2011

7. Katy Perry (33K+)

The new song Skyscraper by @ddlovato is pure perfection. Her voice is one of the BEST undiscovered beauties. Can’t wait for the full record. — Katy Perry (@katyperry) July 13, 2011

8. Selena Gomez (32K+)

SO, SO proud of @ddlovato #skyscraper Incredible, beautiful and so inspiring.. — Selena Gomez (@selenagomez) July 12, 2011

9. Rihanna (29K+)

Welcome to the world princess Carter! Love Aunty Rih — Rihanna (@rihanna) January 8, 2012

10. Taylor Swift (25K+)

I’m so 22 right now. — Taylor Swift (@taylorswift13) December 13, 2011

* For the purposes of this article I’ve included only the most-retweeted tweet from any given celebrity. Otherwise, Bieber would probably have most of the top ten. And nobody wants that. Not here, and certainly not in the charts.

Also, as I said at the start, this list changes a lot and pretty much any major celebrity tweet can suddenly go through the roof. So, if you can find a tweet that should definitely be on this list, please comment below and link directly to the tweet so I can investigate myself. (Note that I’m only including one tweet per celebrity, so please only link to their top tweet.) I don’t have time to scroll through feeds or check out any celebrity who you think should be on here, but I’m happy to update this list if you guys do some of the work. I just need proof. Thanks!

(Thanks: Twitsprout.)