"Girls Just Want to Have Fun" is a song written by and first recorded by American musician Robert Hazard. However, it is much better known as a single by American singer Cyndi Lauper.

Orcas are at the top of the food chain, but it is unprecedented that they would go after a great white shark. From the boat, whale watchers and experts alike are shocked by what they see.

Andrew McCarthy goes on a wild goose chase looking for a gravity hill in Ireland, and in the process shows us the charm of the Irish countryside.

Watch the official video for Justin Bieber's 2010 hit song "Baby," in collaboration with Ludacris. This video has both been YouTube's most watched, and most disliked video of all time. Enjoy.

When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic cascade and how exactly do wolves change rivers? George Monbiot explains the process.

Beyoncé performs "Single Ladies (Put a Ring on It)" live in Central Park as part of the Good Morning America 2011 Summer Concert Series.

Red simply doesn't want to wake up for school! David struggles to get him out the door, but there is something important that he is forgetting...

British singer Ellie Goulding visits radio station 104.3 MYfm in Los Angeles to deliver an exclusive live performance for a few lucky listeners.

From time to time, we give celebrities a chance to read some of the mean things people tweet about them. We extended that same offer to our Commander in Chief, who happily agreed. This is an all President Obama edition of #MeanTweets.

For the body and the mind: Try out some knee exercises and learn some new vocabulary related to posture and fitness. Enjoy!

Why would a killer whale go after a great white shark? Enter Alisa Schulman-Janiger, a biologist who is very familiar with the different families of killer whales off the coast of California.

Steve Skaith sings "The Men Below," a song about a mining strike in England in the 1980s.

If you don't feel like putting the time and effort into baking a whole cake, then try the fantastically fun and simple Two Minute Mug Cakes! All you need is a microwave, a mug, and a few ingredients, and you have an instant treat to enjoy on your own or to make for your best friends!

UNICEF Goodwill Ambassador Katy Perry delivers a special weather report on the devastating effects of climate change for the world’s children.

"Shake It Off" is a song recorded by American singer-songwriter Taylor Swift for her fifth studio album. It is an uptempo dance-pop track that signified a departure from her earlier country-influenced pop.