Adele's 'Hello' video has already had an incredible 50 million views on YouTube. But she's not the only artist that enjoys a greeting song lyric. So next time you want to say hi, or bye, try these...

1. Adele, Hello

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2. Jade, Don’t Walk Away

3. Lionel Richie, Hello

4. N’Sync, Bye, Bye, Bye

5. The Beatles, Hello Goodbye

6. Beyonce, Hello

7. Spice Girls, Goodbye