A meme is an internet fad that becomes popular for no particular reason. They are a little bit of modern culture that goes beyond borders and ethnicity and out into the wonderful World Wide Web.

Some are songs, others just forwarded on e-mail, and others become YouTube hits. Many are inspired by movies, hit television series or even video games.

One popular meme involves 'rickrolling', in which pranksters try to get people to click on a link to the 1987 song Never Gonna Give You Up by Rick Astley. If the person clicks on the song, they have been officially 'rickrolled'.

The top one so far this year has been dubbed lolcats. People post funny pictures of their cats, with sayings in kittyspeak. Some of them are pretty hilarious, but don't quote them on your next school essay.

Other memes you might want to look up include 'Oolong the Pancake Rabbit' and 'all your base are belong to us'.

Top album download

21 (Adele)

Adele has topped iTunes chart with her latest album, 21, which is named after her age at the time of its production. The album, featuring a blend of pop, blues, rock and soul, has received overwhelming positive reviews. Adele flooded the album with her sentiments, including her recent break-up. A light rock ballad entitled Set Fire to the Rain was released early this month to fuel the sales of the album, which talks about the struggles and sacrifices people sometimes have to go through to make a relationship last.

Most viewed video on YouTube

Amy Winehouse's Back to Black tour: live in Belgrade, Serbia, on June 18

Immediately after Winehouse died, the speculation began on why and how it happened. Amid a flood of references made on her excessive drug use, a video of her live performance more than six weeks ago began circulating on YouTube. The uploader of this video, apparently convinced that she was killed by her reliance on drugs, refers to her as 'drugged or stoned' in the caption. In the video, Winehouse mumbles some phrases from the lyrics, but is unable to follow her band.

Top photo: public anger mounts over government's priorities

The fatal train crash in Wenzhou, Zhejiang, on July 23 fuelled much public anger. People believe the central government is obsessed with glory in the building and operating of the nation's high-speed rail system - at the expensive of safety. A photo was taken at the crash site the day after two high-speed trains collided, killing at least 40people. The photograph shows people watching anxiously as rescuers remove bodies and personal items from one of the wrecked train carriages. Speculation focused on whether a passenger being unloaded was alive or dead.