Ok to update to iOS 5 from 4.2?

Hello. I have an iPhone 4 and would like to iOS 5. I am currentyl running 4.2.1 and have nerver updated to any of the 4.3 versions for whatever reason. Is it ok to skip 4.3 and update directly from 4.2 to 5? Are there any known issues of skipping versions for such a drastic update?
Thank you.

You appear to have a second generation iPod touch, which can't be updated past 4.2.1.
(100087)

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     Device                                       iOS Verson
iPhone 1                                      iOS 3.1.3
iPhone 3G                                   iOS 4.2.1
iPhone 3GS                                 iOS 6.1.x
iPhone 4                                      iOS 7.0.x
iPhone 4S                                    iOS 7.0.x
iPhone 5                                      iOS 7.0.x
iPhone 5c                                     iOS 7.0.x
iPhone 5s                                     iOS 7.0.x
iPod Touch 1                               iOS 3.1.3
iPod Touch 2                               iOS 4.2.1
iPod Touch 3                               iOS 5.1.1
iPod Touch 4                               iOS 6.1.x
iPod Touch 5                               iOS 7.0.x
iPad 1                                          iOS 5.1.1
iPad 2                                          iOS 7.0.x
iPad 3                                          iOS 7.0.x
iPad 4                                          iOS 7.0.x
iPad Mini                                      iOS 7.0.x
iPad Air                                        iOS 7.0.x
=====================================
Select the method most appropriate for your situation.
Upgrading iOS
   1. How to update your iPhone, iPad, or iPod Touch
   2. iPhone Support
   3. iPod Touch Support
   4. iPad Support
     a. Updating Your iOS from iOS 5
          Tap Settings > General > Software Update
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        1. iOS - Unable to update or restore
        2. iOS- Resolving update and restore alert messages

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