Tell me whether these people are DJs or singers: David Guetta, Avicii, Rihanna, Beyonce, Martin Garrix, Calvin Harris, Taylor Swift
David Guetta: DJ
Avicii: DJ
Rihanna: Singer
Beyonce: Singer
Martin Garrix: DJ
Calvin Harris: DJ
Taylor Swift: Singer
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Tell me whether these people are DJs or singers: David Guetta, Avicii, Rihanna, Beyonce, Martin Garrix, Calvin Harris, Taylor Swift
### Input: 
### Response: David Guetta: DJ
Avicii: DJ
Rihanna: Singer
Beyonce: Singer
Martin Garrix: DJ
Calvin Harris: DJ
Taylor Swift: Singer