Firework is most
well some of the most famous are shannon woodward, rihanna & DJ skeet skeet but she has more
She co-writes all of her songs. Which means that the REAL song writer agrees to let Katy change a couple of words in a song so that Katy can get credit for writing the song to make her seem like a real musical artist instead of a just a singer.
One is the Lunar Eclipse
There are many major events that happened in 1920. However, the most popular one was The Great Depression which had impact in the entire world.
I guess it is difficult to quantify which are the major events in UK and I expect it changes annually. I can point you in the direction of a site from which it is possible to search events in the major cities of the UK as well as the most popular cities. See the related links to search results which are regularly updated and for the most cases will only return events which are yet to happen.
California gurls and Teenage dream are definitely her best songs !!!!!!!!!!!!!!! there up beat extremely catchy and california gurls is the 8th most bought song on itunes and teenage dream is the 13th!!!!! so probably california gurls and teenage dream
One of the most major thing's happening in the 1950's was the Korean War.
Katy Perry most enjoyed Maths at school !.
singing
This answer could most likely be derived from the experience of reading the book.
The end of the Vietnam War due to the fall of Saigon