I've made a quick interpretation of the song Umbrella:

"Umbrella"

[Jay-Z:]
Ahuh Ahuh (Yea Rihanna)
Ahuh Ahuh (Good girl gone bad)
[Jay-Z speaking of how Rihanna sold her soul]
Ahuh Ahuh (Take three... Action)
[number significance here: 3. anyone?]
Ahuh Ahuh

[Jay-Z and demonic entity:]
No clouds in my storms
[a storm without clouds? This means that it's not a normal storm; it's an artificial one. here, the rainman is speaking through Jay-Z. Rainman is a demonic entity that possesses these hip-hop artists.]
Let it rain, I hydroplane in the bank
[rain/storm is an archetype for washing away the old system (our current monetary/financial systems). Jay-Z is saying that he can just hydroplane in the bank because he is not affected by the storm.]
Coming down with the Dow Jones
[note: this music was made before the financial meltdown of this year. predictive programming: it was all planned.]
When the clouds come we gone, we Rocafella
[Roc-a-fella is Jay-z's recording company. it is full of Illuminati performers. he may also be citing the Rockefeller family, or the elite in general.]
We fly higher than weather
[Jay-Z is saying that he and his friends are immune to the weather.]
And G5’s are better, You know me,
[G5 is a kind of private jet so he will live in luxury even when the crisis strikes the rest of the world.]
an anticipation, for precipitation. Stacked chips for the rainy day
[he is safe in anticipation for the rainy day. the stacked chips could mean something else; it could mean rfid chips for the population when the rainy day comes.]
Jay, Rain Man is back with little Ms. Sunshine
[Rainman speaking through Jay-Z. he will be back with some other demon, a female one this time.]
Rihanna where you at?
[Rihanna, are you with me/us?]

[Rihanna:]
You have my heart
[she has given her heart to the demon.]
And we'll never be worlds apart
[they will never be apart: Rihanna and the higher-dimensional demon. 'worlds' here means 'realms' or 'dimensions'.]
May be in magazines
[Rihanna speaks that they may be worlds apart in magazines. to the media, she has to fake her true alliance to the devil.]
But you'll still be my star
[lucifer, the morning star.]
Baby cause in the dark
[she was in the dark before, but then she found the 'light'.]
You can't see shiny cars
[she could not see shiny cars (riches) in the dark.]
And that's when you need me there
With you I'll always share
Because

[Chorus:]
When the sun shines, we’ll shine together
[when lucifer shines again, she'll shine together with him.]
Told you I'll be here forever
Said I'll always be a friend
Took an oath I'ma stick it out till the end
[she made a pact with the devil.]
Now that it's raining more than ever
[financial turmoil. the North-American empire reaching its end.]
Know that we'll still have each other
You can stand under my umbrella
[this is the demon talking through her; saying that she can stay under his control.]
You can stand under my umbrella
(Ella ella eh eh eh)
Under my umbrella
[now, here is interesting: "ela e" in portuguese means "she is" -> "she is under my umbrella" -> this is the demon talking about Rihanna (and also through her).]
(Ella ella eh eh eh)
Under my umbrella
(Ella ella eh eh eh)
Under my umbrella
(Ella ella eh eh eh eh eh eh)

These fancy things, will never come in between
[Rihanna says that her wealth and money are not important. it's her relationship with the devil that matters most.]
You're part of my entity, here for Infinity
[lolz.]
When the war has took it's part
[when part of the population is being decimated by elite-sponsored wars -> this was their plan, and may still be.]
When the world has dealt it's cards
[the Illuminati loves to plan which cards are played on humanity's future. there is certainly a "wild card" waiting to be played in our near future.]
If the hand is hard, together we'll mend your heart
[if the card is played successfully, they will join hearts and fuse together -> she will give herself completely and let her soul energy be absorbed by the demonic entity.]
Because

...