
Spectators are invited to sign the 2015 THON Memories Museum Guest Book with a favorite memory from past dance marathons or answer the question: "Who do you THON for?" Even though the Bryce Jordan Center has only been open for a few hours the memory book is already starting to fill up. So be sure to look through the book at some point over the weekend and add your own message.

We all know the basic stats about THON, but what are some lesser-known figures? Here's THON by the numbers.

This year's line dance, per usual, is rife with cultural references and popular songs from the year. Without further ado, we give you the THON 2015 Line Dance lyrics.

In what is the culmination of an entire year of fundraising for the Four Diamonds Fund, dancers stood up in the Bryce Jordan Center on Friday night to officially kick off THON 2015. They won't get another chance to sit on the arena floor until 6 p.m. on Sunday after 46 straight hours of dancing.

Tweeting Friday to her 12.9 million followers, the reality star sent her best wishes to all the Penn Staters participating in THON this weekend.

Singer, songwriter, and actress Hannah Richardson impressed the THON crowd at BJC with her version of "Imagine."