You can't - you must delete them individually.
Go to your favourites, hover over the one you want to delete and click on 'delete'.
Zayn Mailk did delete his twitter because haters abused him on twitter but he came back because all his lovahs gave him lovable commits and he read them and he came back :,]
Just open C:\Users\<your account>\Favorites and delete all (export if needed first)
click on delete all
You have to delete the Tweet all together, in which you will click your tweet with the unwanted picture, and to the far right there should be a trash can.
If you want to delete all your messages on yahoo at once you have to click ctrl+a and then you click delete
All you have to do is stop being a baby and figure it out yourself bunch of beeps that means curses think for yourself.
Even I looked all over for this, but to no avail. So, I made one myself. Check it out here. It's called TwitWipe. (see related link #1)
You need to check delete all emails, once you have done that they will go to the trash can, you have to clean the trash can out as well.
In Windows there are 2 ways to do this but you didn't say which browser so I will assume you're using IE8 or IE9. in both browsers the easiest way is to click on your favorites menu. A drop down will appear with all your favorites. It depends on how you placed it. I use folders for categories and if there is something inside one of those folders I want to delete. I scroll down to that folder. Then a sub-folder appears with all the pages I've saved. If the one I want to delete is there I just right click on it and choose delete. The other way is more steps. In IE8 you click on the favorites menu in the favorites bar. There are 3-4 choices right below it. The one to choose is called "organize favorites". A tab will open up with all your favorites folders. Click the folder the page is in this will open that folder then click the page you want to delete and click the delete button located in the bottom of the tab. then click close. In IE9 in order to open up the "organize favorites" tab, you must click on the star located in the upper right corner of the browser. Then click the arrow next to the favorites button and the drop down menu will appear with the "organize favorites" at the bottom. Once you click that the tab will open up and follow the same intstructions above. If you're using Firefox or Chrome you will have to ask a new question and be sure to put in the exact browser you're using along with which version.
Twitter feeds claiming to be Kate Gosselin appear all the time, all of them have been proven fraudulent. If Kate Gosselin does have a Twitter feed, it is not public. So the answer is, no one knows because it is extremely unlikely that it was Kate Gosselin's Twitter feed.
You can delete all messages in your history at once on Tagged by first logging into your online account and navigating to the account settings. Then click to delete all message history and hit confirm.