How many world tours has Katy Perry been on?
4
1
1
2
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
4
2
3
1
4
2
3
1
4
2
3
1
4
2
3
1
4
2
3
1
4
5
2
3
1
4
5
2
3
1
4
5
2
3
1
4
5
2
3
1
4
5
2
3
1
4
5
2
3
4
0
5
2
3
4
5
0
3
4
5
0
4
5
4
5
7
4
5
6
7
4
5
6
7
4
5
6
7
4
5
6
7
5
6
7
5
6
7
5
6
7
5
6
7
5
6
7
8
6
7
8
One
6
7
9
8
One
6
7
9
8
11
One
6
7
9
8
11
One
10
6
7
9
8
11
One
10
6
7
9
8
11
One
10
6
7
9
8
11
One
10
6
7
9
8
11
One
10
6
7
9
8
11
One
12
10
6
7
9
8
11
One
12
10
6
13
No
9
One
ONE
ONE
3000
ONE
One.
3000